Could there be an episode about barrel internals - 3 groove / 4 groove / 5 or 6 groove - optimal percentage of groove vs lands surface - sharp groove edges / round edges - barrel resistance against a measured push force with different bullets and barrels And the spread of that data
Thank you very much. This podcast and Jeff Siewert's book will help me gain a better understanding of a truly fascinating subject. If I might make a suggestion ... when showing charts and diagrams, fill the screen for clearer viewing and keep the visual aid on the screen longer while the discussion is continuing. Thanks again, gil
Before hearing the podcast, i've always thought "why all barrels aren't with this kind of twist?". I'm in 03:45 to the podcast and hoong to love every second of it 😊 That's a quick answer 05:40. "You can't have this twist with button and cold hammer forged barrels" That was easy and logical. Why didn't i think of that my owe? That's why i'm here❤
One of the barrel makers (from Bartlein, IIRC) has said that if the twist rate drops at all near the muzzle, accuracy will suffer. Apparently, this can occasionally happen with button rifling if there is a impurity or hard spot in the barrel steel. He said that a small gain twist can be useful just to assure that any error in the rifling process will be overcompensated by the twistrate gain.
We noticed Tipped and some hollow points work way better on varmints like coyotes, bobcats and racoons when the twist rate is faster than factory rifles. Those 30 cal bullets just twist those yotes up.
@@rickschwertner282 From what I have read, higher twist rate also seems to help with monolithic bullet expansion as well. My guess is that the increased centrifugal force causes the jacket and core to fly apart faster after they are damaged from the initial impact.
Great stuff guys. Love Quinnlin and Jeff on there. Miles and others as well. Just good stuff. For shooters who want to learn. And US out there who want to learn all we can about what we love to do in this world. 🔫 Pew pew
I have a Bartlein bbl gain twist 6.5-284 Norma. It's excellent. Most impressive was my latest load I worked up for it with Barnes 127LRX over H1000. The entire OTC testing with about 10 shots never measured over 1/2" on the nose. All 10 made, literally, what looks like a smiley face smile. I know it will take a year or more but I'm thinking about ordered a few 4 groove gain twist barrels from them.
Nice episode. Love the podcasts with Jeff, I will need to listen this episode more times so I can understand more. Comes from norway so my engelish is not the best 🤣🤣 but great podcast Seth and the Hornady team 🙂
Hit information overload at 41 minutes, will have to come back and listen to the rest, and most likely listen to entire podcast a second time. Valuable information but does take some processing.
Way over my head! I am just trying to make enough velocity to make the bullet preform in the game animal and shoot a good group at 200 yards but very interesting how much you can even measure like exting pressure versus starting is mind blowing drag forces to gravity having the ability too measure such things is very interesting! Thanks for making the work day go by!
I have seen personally that different powders resulted in different group sizes at different velocities. I did a 100 round 223 test with the Hornady 55 gr vmax bullet and the results were interesting. Varget was the best result, but I found more interestingly H335 started to group at around 2800 and with a increase in about 1 grain of powder the group size went from about 1" to over 6".
I got the book "Ammunition Demystified". Read it front to back. Contains plenty of good stuff to learn from. Static electricity and plastic reloading tools. Why do manufactures use plastic powder hoppers on a powder measurers when it causes static electricity to bridge the powder in the drop down spout, whereby causing light squib loads in some cases and the next ones gets a charger and a half that blows up the guns? It is a well known phenonium (mentioned by George C. Nonte and Robert A. Rinker in their books) and yet ALL the manufacturers of these powder measurers still go with plastic powder hoppers. All the while DRAMWORKS makes Pyrex powder hoppers for all the major brand powder measurers to replace the plastic ones to negate the hazard of static electricity bridging the powders.
I've understood that gas exit can cause issues, especially after high-speed footage, which has shown how much it surpases the bullet at exit. I think flat base bullet perform better at containing the gas behind the bullet as well as when the gas is surpasing the bullet it doesn't have the angular section of a boat tail to leverage on. Is this technically supported? Secondly knowing the gas exit situation and how the various muzzle devices, such as suppressors on average will help the average dispersion. But all the devices discussed are post exit, never hear anyone discuss porting of the barrel(usually used for recoil management) wouldn't dropping those gas pressure/forces while the bullet is still under control the best way to do it? In my understanding, it seems the most logical to control the gas while still controlling the bullet.
I have a question. The constant twist rate, torque chart is low, while the parabolic gain twist rate is high and consistent from start to end. Does that mean that the barrel ends at the determined twist rate? Would it not be better to have a section of the rifling to be standardize, closer to the muzzle to mitigate the torque. For example using an 18 inch barrel, a 1:12 gain twist to 1:8 over 8-12 inches of travel with 4-6 inches of standard 1:8.
General practice has been to transition to constant twist for the last two calibers of travel; perhaps this should be changed to the last two bourrelet lengths of travel for small cal systems.
One of the things I've always wondered about is what the pressure is and where the bullet is as it moves down the barrel. where is the bullet when peak pressure is reached ? Also, would different powders reach max pressure at the same place using the same bullet ?
@@daryliser7900 I've been told that there can be two maximum pressure spikes inside the chamber of modern smokeless rifle propellant firearms. However, it has been said that the traditional black powder rifle develops it's maximum pressure through out the length of the bore. Interestingly, a bore obstruction will develop maximum pressure somewhere prior to the obstruction. The traditional black powder and rifle could easily withstand a double charge of black powder while launching an entire cleaning rod perfectly 🤔
It’s my opinion you can probably put more bullets on a gain twist barrel & get them to successfully attain full spin than you could with a constant twist barrel.
Question for the follow up. I think Jeff called it “jacket movement”, I thought of it as axial torque on the jacket as the projectile travels the length of the bore as a result of twist rate increase. Question is, could Jeff elaborate more on this effect. With the medium caliber he states the bearing surface of the projectile which goes the full depth of the grooves is shorter which would be less affected by the gain, whereas a full length bearing surface could see a greater twisting effect on the jacket. This thought deterred my purchase of a gain twist barrel.
They probably should've started by explaining what they mean by small, medium, and large caliber. I'm thinking anything shoulder fired is considered small, and medium and large might be a 30mm cannon and a 120mm cannon respectively.
I've got a Browning bar mark ii safari w/boss system chambered in 300 win mag. It's a Beast on Accuracy 600 yd shots easy. When using the boss break, it come with 2 solid & the boss system tune It in. Just say, for example, hornety, a 180 grain super performance bullet U can tune it in depending on bullet, wight or Manufacturer are you Familiar with it? An can I get different barrels? And how can I tell when it's just wore out?
Maybe you guys get together and build a chassis that has metallic straps every few inches down the barrel with an isolator between until the last few inches of barrel and see if that kills the vibrations in the barrel to see if groups go bug hole.
@@hornady Solid choice for sure. Thanks!!. Mr. Steve is going to be at my local gun store today in Madison, Alabama, anything I can say to him to get a laugh out of him?
Has anyone looked at how storing your rifle can affect accuracy. Example. Stored horizontal, the barrel is being pushed down by gravity for days or weeks at a time. Stored barrel up or down, or stored barrel up but at an angle or leaning against a wall. It seems this could account for a shift in accuracy at distance. Great information Thanks
When I meet a stranger and they ask me what is my Hobby and I tell them, Bullets ballistics and trajectories. Oh the looks I get. They look at me as if I'm the Thomas Crooks😂
Can you use gain twist to increase the life of a barrel in a hot rod cartridge like the 6mm Creedmoor. For example: you have an application the 6mm Creedmoor hunting white tail deer hunting that needs 1 moa standard of "Hit Probability" isolating all other factors like poor ammo or shooter error across 400-600 yards. Can the gain twist maintain that 1 moa standard "Hit Probability" past the normal barrel burn out of the 6mm Creedmoor life into 6000-10000 rounds before the barrel need to be replaced. The Applications of this method is not to have the smallest group on the cutting edge but, to have an heirloom rifle that the shooter can practice with at a higher round count while maintaining the targeted standard thought the life of the barrel? Or in the M4 where the Military targeted accuracy of the M4 is 4 Moa over the life of the barrel. Can gain twist barrel allow for the Military set a new accuracy standard applied to the life of the barrel with the same firing cycles set by the testing trials? Can the Military use this principal to give the US troops a new found confidence of 1 MOA from their service rifle? Can it also allow for a targeted "Hit Probability" in a longer strings of fire? For example, in a large frame AR using .308 can you maintain standard "Hit Probability" of 1 MOA with a 5 shoot string to 20 shoot string while maintaining the "Hit Probability" standard. Application would be gas PRS comps or Urban engagements in the conflict area? This also take out all of other problems that Myles has encountered with the gas system and accuracy.
Have a 264wm 10-8 gain. So despite being a small caliber. So the 10 at the action, lessens torque of the jacket/rifling, helps slow throat erosion? So a burner like 264wm or 6.5 prc would get the benefit of the 8 twist for large bullet stabilization, and extend barrel life?
@@jeffsiewert1258is this effect equal between different types of rifling? I.e. does it provide the greatest benefit for perpendicular standard rifling vs. 5R/Caudal/other polygonal rifling, the same benefit, or potentially the reverse (since standard rifling tends to be hardest on the jacket)?
I’m not aware of any data on the topic, but good question. I’ve never seen gain twist polygonal rifling, but if you’re using single point tooling or a broach stack, there’s no reason you couldn’t make it.
Man I like when Jeff is on. Seth, I have a great marketing ploy for you. Find your favorite charity, then lets have a raffle. Raffle tickets would be, oh I don't know, $20-$40 each. The winner gets to tour the Hornady facility capped off with a guest spot on the podcast with Jeff, Jayden, Miles and Yourself. If it would be possible for a live cast it would be Christmas in July.
What are we referring to as far as small, medium, large calibers in military anything under 50 cal was small. In world of hunting and comp shooting what calibers fall under these reference sizes?
Small caliber is basically all "small arm" calibers, up to and including .50 cal. Medium caliber is what is typically used in auto cannons, from 20mm up to about 50mm (practically). Large cal usually refers to tank main gun and artillery, which is 100mm and up.
@@Ared1lb1535 that would not make any since as they are not talking about anything larger than 50 cal and continue to talk about small medium and large. The reference you have given was the same as I had when in the military but as a civilian shooting company that Hornady is there is no way they are discussing the same size reference you gave but thanks for trying to help.
hi, a very interesting video. My question- if I am building a 338 log range papar puncher gun can I use a gain twist? if yes who wouls make a 29-31 inch long 338 barrel for me?
Left-hand twist causes the “spin drift” to be in the opposite direction of the Coriolis deflection in the northern hemisphere, partially canceling it. The problem you run into is the spin drift is proportional to the twist & ballistic drop, while the Coriolis depends on the latitude & azimuth of fire in addition to the range.
Another excellent podcast. I have a question for both Jayden & Jeff. With regard to muzzle exit conditions & the affects on the projectile. Might there be a possible affect upon the dynamic stability due to the reverse gas flow around the projectile at muzzle exit combined with high gas pressure which may cause the spin rate to be inadequate at muzzle exit which, may cause the projectile to be momentarily dynamically unstable? If this were the case, it may be much more important to use a muzzle brake or moderator to reduce the gas velocity. Could it be possible that the gases at muzzle exit are in effect, far less dense than the air which could have the affect of over-stabilization causing a larger overturning moment. Just something to think about.
In my opinion, it’s not as sensitive to the changes being made, what’s being seen is the normal group-group size variation that comes with small sample sizes.
🕵♂️ According To Gunsmith "Quarter Minute Magnum", Accuracy is MAXIMIZED When The Barrel Twist Rate Is Just Enough To Stabalize The Bullet! Thus, If The Bullet Stabalizes At a 1 In 9 Twist - Accuracy Will Get Worse As You Go To a Faster Twist Rate! It Sounds As If You Guys Agree? 🤷♂️
Agree as a matter of principle, but experience w/ firing data shows dispersion shows it isn’t linear with increasing twist rate, which is what you’d expect if principal axis tilt and center of gravity offset were the “driving the bus”. IMO, reverse fow at muzzle release is a significant contributing factor.
@jeffsiewert1258 Thank You For Answering The Question! 😁 Of Course I Didn't Expect "Despersion To Be Linear" - But, "Trending" in a Specific Direction of "Predictable Inconsistancy"! 🎯🤪
Can’t get enough of Jeff! Always my favorite episodes
I’m completely addicted to these podcasts
Seth on that hornadymania BROTHER
Could there be an episode about barrel internals
- 3 groove / 4 groove / 5 or 6 groove
- optimal percentage of groove vs lands surface
- sharp groove edges / round edges
- barrel resistance against a measured push force with different bullets and barrels
And the spread of that data
Thank you very much. This podcast and Jeff Siewert's book will help me gain a better understanding of a truly fascinating subject. If I might make a suggestion ... when showing charts and diagrams, fill the screen for clearer viewing and keep the visual aid on the screen longer while the discussion is continuing.
Thanks again,
gil
Before hearing the podcast, i've always thought "why all barrels aren't with this kind of twist?".
I'm in 03:45 to the podcast and hoong to love every second of it 😊
That's a quick answer 05:40. "You can't have this twist with button and cold hammer forged barrels"
That was easy and logical. Why didn't i think of that my owe?
That's why i'm here❤
One of the barrel makers (from Bartlein, IIRC) has said that if the twist rate drops at all near the muzzle, accuracy will suffer. Apparently, this can occasionally happen with button rifling if there is a impurity or hard spot in the barrel steel. He said that a small gain twist can be useful just to assure that any error in the rifling process will be overcompensated by the twistrate gain.
We noticed Tipped and some hollow points work way better on varmints like coyotes, bobcats and racoons when the twist rate is faster than factory rifles. Those 30 cal bullets just twist those yotes up.
@@rickschwertner282 From what I have read, higher twist rate also seems to help with monolithic bullet expansion as well. My guess is that the increased centrifugal force causes the jacket and core to fly apart faster after they are damaged from the initial impact.
Always Great to get more of the Jeff! I Even bought the book, a Great read!
Thanks much!
Looks like Seth is getting geared up for Hornady's WWE team!
Yeaaaahhh Brother!
Sooooo what ya gonna do when the Swerczek runs wild on you
@@hornadycame for this! Not disappointed, cheaper ammo soon?
More accurate shooting with more weight against the rifle!
Awesome explanation of all the variables! Thank you!!
Glad you enjoyed it!
Many golden Nuggets of information. Thank you.
Our pleasure!
Great stuff guys. Love Quinnlin and Jeff on there. Miles and others as well. Just good stuff. For shooters who want to learn. And US out there who want to learn all we can about what we love to do in this world. 🔫 Pew pew
Flat base bullets vs boat tail
Advantages and disadvantages of both may be a good topic or at least partial topic
Great episode
This is a wonderful podcast.
Thank the Hornady guys too..
I feel you Jeff. We all want Miles there. #InMilesWeTrust
I have a Bartlein bbl gain twist 6.5-284 Norma. It's excellent. Most impressive was my latest load I worked up for it with Barnes 127LRX over H1000. The entire OTC testing with about 10 shots never measured over 1/2" on the nose. All 10 made, literally, what looks like a smiley face smile. I know it will take a year or more but I'm thinking about ordered a few 4 groove gain twist barrels from them.
Do you mean gain twist and wax on the stache? Great podcasts, keep it up Hornady.
Nice episode. Love the podcasts with Jeff, I will need to listen this episode more times so I can understand more. Comes from norway so my engelish is not the best 🤣🤣 but great podcast Seth and the Hornady team 🙂
Glad you enjoyed it!
Hit information overload at 41 minutes, will have to come back and listen to the rest, and most likely listen to entire podcast a second time. Valuable information but does take some processing.
Way over my head! I am just trying to make enough velocity to make the bullet preform in the game animal and shoot a good group at 200 yards but very interesting how much you can even measure like exting pressure versus starting is mind blowing drag forces to gravity having the ability too measure such things is very interesting! Thanks for making the work day go by!
I have seen personally that different powders resulted in different group sizes at different velocities. I did a 100 round 223 test with the Hornady 55 gr vmax bullet and the results were interesting. Varget was the best result, but I found more interestingly H335 started to group at around 2800 and with a increase in about 1 grain of powder the group size went from about 1" to over 6".
I got the book "Ammunition Demystified". Read it front to back. Contains plenty of good stuff to learn from.
Static electricity and plastic reloading tools. Why do manufactures use plastic powder hoppers on a powder measurers when it causes static electricity to bridge the powder in the drop down spout, whereby causing light squib loads in some cases and the next ones gets a charger and a half that blows up the guns? It is a well known phenonium (mentioned by George C. Nonte and Robert A. Rinker in their books) and yet ALL the manufacturers of these powder measurers still go with plastic powder hoppers. All the while DRAMWORKS makes Pyrex powder hoppers for all the major brand powder measurers to replace the plastic ones to negate the hazard of static electricity bridging the powders.
Keen to hear about Jeffs experience with subsonic 300 blackout
Learning so much! 😁
Rock on!
I have his book and it's really good. I'd love to hear a extended version of his opnion on polyoginal rifle barrel
I've understood that gas exit can cause issues, especially after high-speed footage, which has shown how much it surpases the bullet at exit. I think flat base bullet perform better at containing the gas behind the bullet as well as when the gas is surpasing the bullet it doesn't have the angular section of a boat tail to leverage on. Is this technically supported? Secondly knowing the gas exit situation and how the various muzzle devices, such as suppressors on average will help the average dispersion. But all the devices discussed are post exit, never hear anyone discuss porting of the barrel(usually used for recoil management) wouldn't dropping those gas pressure/forces while the bullet is still under control the best way to do it? In my understanding, it seems the most logical to control the gas while still controlling the bullet.
I have a question. The constant twist rate, torque chart is low, while the parabolic gain twist rate is high and consistent from start to end. Does that mean that the barrel ends at the determined twist rate? Would it not be better to have a section of the rifling to be standardize, closer to the muzzle to mitigate the torque. For example using an 18 inch barrel, a 1:12 gain twist to 1:8 over 8-12 inches of travel with 4-6 inches of standard 1:8.
General practice has been to transition to constant twist for the last two calibers of travel; perhaps this should be changed to the last two bourrelet lengths of travel for small cal systems.
I’m exceptionally skeptical, i want to see the data.
After he does his rethinking, I’d love to hearing his take on load development methodology.
One of the things I've always wondered about is what the pressure is and where the bullet is as it moves down the barrel. where is the bullet when peak pressure is reached ? Also, would different powders reach max pressure at the same place using the same bullet ?
Bullet travel at peak pressure is a few calibers of travel (for rifle calibers), shorter for pistol cartridges.
Different powders provide different max pressure travel distances with the same bullet.
@@daryliser7900 I've been told that there can be two maximum pressure spikes inside the chamber of modern smokeless rifle propellant firearms. However, it has been said that the traditional black powder rifle develops it's maximum pressure through out the length of the bore. Interestingly, a bore obstruction will develop maximum pressure somewhere prior to the obstruction. The traditional black powder and rifle could easily withstand a double charge of black powder while launching an entire cleaning rod perfectly 🤔
How does this affect barrel life if any. Something not mentioned here
Love this podcast thanks for all the information you share
It’s my opinion you can probably put more bullets on a gain twist barrel & get them to successfully attain full spin than you could with a constant twist barrel.
Question for the follow up. I think Jeff called it “jacket movement”, I thought of it as axial torque on the jacket as the projectile travels the length of the bore as a result of twist rate increase. Question is, could Jeff elaborate more on this effect. With the medium caliber he states the bearing surface of the projectile which goes the full depth of the grooves is shorter which would be less affected by the gain, whereas a full length bearing surface could see a greater twisting effect on the jacket. This thought deterred my purchase of a gain twist barrel.
They probably should've started by explaining what they mean by small, medium, and large caliber. I'm thinking anything shoulder fired is considered small, and medium and large might be a 30mm cannon and a 120mm cannon respectively.
Thanks for advancing our knowledge. Not gain twist but what about effect of "choke" on the muzzle end of barrels? Any benefits?
No first-hand experience with “squeeze bore” barrels but I’d expect it to help to some extent. How much? Time to go test.
Carcano baby
I've got a Browning bar mark ii safari w/boss system chambered in 300 win mag. It's a Beast on Accuracy 600 yd shots easy. When using the boss break, it come with 2 solid & the boss system tune It in. Just say, for example, hornety, a 180 grain super performance bullet U can tune it in depending on bullet, wight or Manufacturer are you Familiar with it?
An can I get different barrels? And how can I tell when it's just wore out?
Maybe you guys get together and build a chassis that has metallic straps every few inches down the barrel with an isolator between until the last few inches of barrel and see if that kills the vibrations in the barrel to see if groups go bug hole.
He may have been asked in a previous visit but I'm curious how Jeff would answer the one bullet/one cartridge question
Going off of memory here, but it was 30-06 and I think 180 Interlock?
@@hornady Solid choice for sure. Thanks!!. Mr. Steve is going to be at my local gun store today in Madison, Alabama, anything I can say to him to get a laugh out of him?
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Has anyone looked at how storing your rifle can affect accuracy. Example. Stored horizontal, the barrel is being pushed down by gravity for days or weeks at a time. Stored barrel up or down, or stored barrel up but at an angle or leaning against a wall. It seems this could account for a shift in accuracy at distance.
Great information
Thanks
When I meet a stranger and they ask me what is my Hobby and I tell them, Bullets ballistics and trajectories.
Oh the looks I get. They look at me as if I'm the Thomas Crooks😂
Can you use gain twist to increase the life of a barrel in a hot rod cartridge like the 6mm Creedmoor. For example: you have an application the 6mm Creedmoor hunting white tail deer hunting that needs 1 moa standard of "Hit Probability" isolating all other factors like poor ammo or shooter error across 400-600 yards. Can the gain twist maintain that 1 moa standard "Hit Probability" past the normal barrel burn out of the 6mm Creedmoor life into 6000-10000 rounds before the barrel need to be replaced. The Applications of this method is not to have the smallest group on the cutting edge but, to have an heirloom rifle that the shooter can practice with at a higher round count while maintaining the targeted standard thought the life of the barrel? Or in the M4 where the Military targeted accuracy of the M4 is 4 Moa over the life of the barrel. Can gain twist barrel allow for the Military set a new accuracy standard applied to the life of the barrel with the same firing cycles set by the testing trials? Can the Military use this principal to give the US troops a new found confidence of 1 MOA from their service rifle?
Can it also allow for a targeted "Hit Probability" in a longer strings of fire? For example, in a large frame AR using .308 can you maintain standard "Hit Probability" of 1 MOA with a 5 shoot string to 20 shoot string while maintaining the "Hit Probability" standard. Application would be gas PRS comps or Urban engagements in the conflict area? This also take out all of other problems that Myles has encountered with the gas system and accuracy.
Dang bro!!! Seth gettin swole!!! Great podcast!!!
That's funny most tuners are brake tuners, goes it could be the brake and shotting thousands of rounds could be the magic, lol.
Have a 264wm 10-8 gain. So despite being a small caliber. So the 10 at the action, lessens torque of the jacket/rifling, helps slow throat erosion? So a burner like 264wm or 6.5 prc would get the benefit of the 8 twist for large bullet stabilization, and extend barrel life?
The gain twist doesn’t prevent throat erosion, it enables the bullet to survive firing in a barrel with forcing cone erosion.
@@jeffsiewert1258is this effect equal between different types of rifling? I.e. does it provide the greatest benefit for perpendicular standard rifling vs. 5R/Caudal/other polygonal rifling, the same benefit, or potentially the reverse (since standard rifling tends to be hardest on the jacket)?
I’m not aware of any data on the topic, but good question. I’ve never seen gain twist polygonal rifling, but if you’re using single point tooling or a broach stack, there’s no reason you couldn’t make it.
Man I like when Jeff is on. Seth, I have a great marketing ploy for you. Find your favorite charity, then lets have a raffle. Raffle tickets would be, oh I don't know, $20-$40 each. The winner gets to tour the Hornady facility capped off with a guest spot on the podcast with Jeff, Jayden, Miles and Yourself. If it would be possible for a live cast it would be Christmas in July.
🤔 I Would Love To See You Do A Follow-Up Podcast On This and Include My Favorite Powder H4831SC? 🙏
What are we referring to as far as small, medium, large calibers in military anything under 50 cal was small. In world of hunting and comp shooting what calibers fall under these reference sizes?
To me 17cal to 25 small 26 to 338 medium 35 to 50 large for hunting purposes can even throw some 338s into large that shoots 300 gr bullets
@@jmgates09thanks that would make most since for me in this case!
Small caliber is basically all "small arm" calibers, up to and including .50 cal. Medium caliber is what is typically used in auto cannons, from 20mm up to about 50mm (practically). Large cal usually refers to tank main gun and artillery, which is 100mm and up.
@@Ared1lb1535 that would not make any since as they are not talking about anything larger than 50 cal and continue to talk about small medium and large. The reference you have given was the same as I had when in the military but as a civilian shooting company that Hornady is there is no way they are discussing the same size reference you gave but thanks for trying to help.
Any bullet that’s body engraved (50 cal & under) is considered “small cal”. 20mm-60mm is “medium cal”. Above there is “large cal”.
Back in the day Pole was a maker of left hand twist with gain twist
hi, a very interesting video. My question- if I am building a 338 log range papar puncher gun can I use a gain twist? if yes who wouls make a 29-31 inch long 338 barrel for me?
What about left gain twist to defeat the corealous effect.
Left-hand twist causes the “spin drift” to be in the opposite direction of the Coriolis deflection in the northern hemisphere, partially canceling it. The problem you run into is the spin drift is proportional to the twist & ballistic drop, while the Coriolis depends on the latitude & azimuth of fire in addition to the range.
Another excellent podcast.
I have a question for both Jayden & Jeff.
With regard to muzzle exit conditions & the affects on the projectile. Might there be a possible affect upon the dynamic stability due to the reverse gas flow around the projectile at muzzle exit combined with high gas pressure which may cause the spin rate to be inadequate at muzzle exit which, may cause the projectile to be momentarily dynamically unstable? If this were the case, it may be much more important to use a muzzle brake or moderator to reduce the gas velocity.
Could it be possible that the gases at muzzle exit are in effect, far less dense than the air which could have the affect of over-stabilization causing a larger overturning moment.
Just something to think about.
I think saying what a medium is, is it 35 cal to 40mm?
I don’t think so. I think it’s probably more like those fired from non-shoulder fired systems.
Bulking or too much summer bbq?
I don’t think Jayden likes the Quinlans Corner thing!
They are so adamant that “3-5 shot groups” are inferior. Please explain why no Fclass guy developed a load with that method
In my opinion, it’s not as sensitive to the changes being made, what’s being seen is the normal group-group size variation that comes with small sample sizes.
🕵♂️ According To Gunsmith "Quarter Minute Magnum", Accuracy is MAXIMIZED When The Barrel Twist Rate Is Just Enough To Stabalize The Bullet! Thus, If The Bullet Stabalizes At a 1 In 9 Twist - Accuracy Will Get Worse As You Go To a Faster Twist Rate! It Sounds As If You Guys Agree? 🤷♂️
Agree as a matter of principle, but experience w/ firing data shows dispersion shows it isn’t linear with increasing twist rate, which is what you’d expect if principal axis tilt and center of gravity offset were the “driving the bus”. IMO, reverse fow at muzzle release is a significant contributing factor.
@jeffsiewert1258 Thank You For Answering The Question! 😁 Of Course I Didn't Expect "Despersion To Be Linear" - But, "Trending" in a Specific Direction of "Predictable Inconsistancy"! 🎯🤪
I always liked varget, and have recently started trying W760
Charity Episode with customer/listener questions
Answered by experts
Question -50 Dollars donation
Topic suggestions 500 Dollar
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