Higher velocity does not mean higher impact. That's only true if u remove the variable of barrel harmonics. Ur OCW is essentially going to be the load that causes the bullet to exit the barrel when it is at either the peak or valley of its whip. Thats where it pauses to go back the other direction. The ladder test is showing you this whipping action on paper. Group 9 is the peak of your whip and thus the best group, this is proven by the fact that group 10 starts going back down.
Johnny, your dedication is infectious! Have you thought if a much more efficient way of load dev that works really well? One that gets you a node within 29 shots that anyone can do? I saw it covered by an Eric Cortina video and it works like this: use QL or similar software(I recommend Gordon’s Reloading Tool). Go out and pick your min and max liads and keep max to about 75% of the way up the ladder. Load 2 bullets at each of 10 increments. Pick a seating depth that allows mag feed and is about 20 to 30 thou off lands when barrel was new…don’t chase the lands! Now shoot each if ten steps in 0.2gr intervals. That’s plenty. Shoot each two at a different dot drawn onto one piece of paper. Look for one or more groups of 2 that make bug holes with no or little vertical. Discard any with spread or vertical. Those are your nodes. You may find two or three within adjacent loads. Pick the middle one. Now go shoot 5 at that load. Tighten groups be working back in 3 thou steps on seating. Do not vary powder. Pick the depth that shows the tightest circular shaped group and not the tighten weather report line. Your done. It works, is simple and more reliable than ocw . You need to pick a node where varying barrel time by seating out or in more than a few thou makes no difference to poi or group. This allows a stable node where varying charge or seating a little gives similar mv and poi and group. It allows tolerance to temp changes. Sd should also be low enough . Job done. Avoid nodes that are hot. They destroy barrel life and reduce safety . Don’t do it!
Mate, g'day from Australia. I have to say Paul C ( 6 comments bellow ) is all over it. I used Eric Cortina's method for my little Grendel Hog killer and it worked ridiculously well. Three steps mate. 1: Pay for good brass, don't be cheap and anneal it. 2: Use that chronograph to map a string of loads at .2 grain increments for let's say ten shots. start 2 grains below max, that will give you plenty of loads to watch for pressure signs. Find the flat spots in the graph where the feet per second doesn't change much, pick one ( there might be a couple ). Then leave the powder charge alone. Groups are not important at this stage, just velocity. 3: Start moving that bullet jump back by about 3 thousandths increments, shooting groups. 3 shots or 5, it"s up to you. It won't take you long to find the sweet spot. I shot 5 groups of 4 at 3 thou increments and am now shooting .3 to .4 inch 4 shot groups with cheap Speer TNT's. Eric said " Bullet jump will make a bad powder load look good and a good powder load look excellent." So find the powder load first, then chase the bullet jump. I started at about 20 thou off the lands and found my sweet spot at 29 to 35 thou off the lands.
I agree with PJS50, my understanding of the ladder test is to find nodes where the changes in adjacent load grain weights does not change velocity much. Then explore those nodes for SD, ES and accuracy. The ladder test helps to find a good area to investigate in a particular load without blowing through all your supplies. I'm writing this in 2021 when all reloading supplies are very hard to come by and costs are at a premium!
I believe you're analyzing your ladder test like an OCW. For the ladder shoot 1 charge weight each on it's own target. So then you end up with 3 different targets. Then look for vertical groups from consecutive loads to find a sweet spot, in the harmonics. Pick the middle charge. Then you can fine tune it at the 100 yd range over a chrono, and seating depth.
Another great video. I really like that new mount. The Vortex switch makes it hard to see a level also. I always glance just before shooting, just to make sure I'm as level as possible.
The work ups in my gun looks like the 27.5 grains of AR Comp is in the sweet spot. Gonna load up another large batch and confirm but the Velocity, SD, and group size were very consistent from 27.0 to 28.0 range with the best groups being 27.5. I did my work ups in .5 grain increments, going to drop down to .3 grains and concentrate on the range that showed promise. I'm shooting a 22" barrel, 1:8 twist. Love this caliber. Really like your videos and content, very helpful.
I would work with the 4th powder charge. The 3rd, 4th, and 5th all look decent with great SD's to boot! When I develop I'm not as worried about vertical height as I am horizontals. If you can stack those holes it's getting down to fine tuning everything and you are getting close with 4 & 5. Making sure powder charges are equal, messing with seating, barrel heat, and working on your shooting skills will tighten that charge up. Good luck. Looks like a nice set up. I'm starting a build and will be doing a series on making your own barrel and installing a barrel extension. Will be doing a 6.5 Grendel so that's how I found your video!
I'd load some charges around 27.3 +/- a few grains and take it to 300+ yards. Shrink the groups by adjusting your seating depth, no? You have the most consistant vertical poi in that range with single digits SD. Seems like you found it!
Thank you for your series of videos load data 6.5 Grendel! I've been out of the scene for some years, and thing s has past me buy in the world of reloading. So what is OWC and Ladder? I started reloading 1990/01, and because of getting into archery in 2007. I stopped shooting and reloading.
Good stuff. bullet velocity is not always going to show increased height in impact with increased velocity. barrel harmonics and bullet whip have a large part in that. not to mention the chrono may affect your data some too. I'd suggest doing the work up w/o the chrono and find a good load and then chrono it after. sometimes increased velocity can actually have lower bullet strikes depending where in the muzzle is pointed when the bullet exits the muzzle due to the barrel harmonics. (probably not the best way to explain it).
Hey Johnny! As I'm looking a your video (part 2, 6.5 grendel OCW), I must agree that without you noting the COAL variations during seating the OCW is a head scratcher, but considering the COAL variations during seating is very thought provoking and could hold keys to decrypting the OCW compiled......m .....
Try shooting one round at each charge weight. Hopefully you will identify a cluster of shots that indicate an accuracy node. Then take those loads and find tune them at 100 yards. Then go back to 400 yards to confirm the best one at distance. I'm no expert, but this seems like it may work.
Your getting pretty stressed about this! What is your intended use for this rifle? Hunting or precision shooting? Your on the right track. Like PMS mentioned 3-5 are good medium loads that won't put a lot of stress on your rifle. If you are trying to get max distance then go with 28 gr. range but make sure you do that when it is hot since it is at the max range. Chill and have fun with it!
As I'm still researching before I do any load dev, I've heard the 6.5 g needs a couple hundred yrs to "settle in" and then the groups tighten back up. I know it sounded counter intuitive to me, but those long distance guys seem to believe in the concept. I remember watching vapor trails for the first time and it blowing my mind how much motion there was. I guess I was expecting lasers. It's a bit of a black art otherwise there would only be one ammo, I guess.
I've just started loading for my Grendel. I went with a 120 gr. TTSX. I worked up to the max load from the Barnes website with 27 gr.RL-15. My velocities were 100fps lower than listed (2400+-). The only difference in the load was that I used Winchester SRP instead of Federal. I can't find Federals! No signs of pressure. I buzzed the web and found a lot of load data that called for CCI 450 SMP. Do you ever use SMPs? I found a load from Alexander Arms that calls for 30 gr. of 748 with the 450. I'm a little nervous about that one but I'm going to try it. Any advice before I blow myself up?
Did you leave the chronograph on your barrel during the ladder test? If so your missing the point of the test. Ladder testing has do with barrel harmonics and finding nods. I look at 1-2 is maybe and 8-9-10 for sure.
Interesting.Ladder. In the loop. grouping 1,2,3 then 4,5,6 then 7,8,9 and 10, each of these sets moved up and to the right, then in each subsequent set the first shot moved back down and to the left. The slope of 7,8,9 was much lower than 1,2,3 or 4,5,6. Just an observation I like the OCW method better.
Ladder test should be one shot per charge all on one target. I never found it of much use. Those who are in favor of it tell me to look only at the vertical shifts. That is only true if barrel vibrations, both axially and radially didn't happen. The third method of selecting a 'best charge' makes more sense to me. (I still prefer OCW) That third method is to shoot over the chrony and use velocity grouping instead.
Ahhh I pick nine. I have typed out a bunch of responses to this comparing barrel harmonics to octaves in music. each octave has the same notes. so your looking for that one note that you rifle sounds the best in. ladder test are usually done in a much more course test. half grain increments think about this as the octave. So once you find what side of the octave your rifle shoots best out now you looking for the note you want to play in. so you run a test of five groups half grain each. 43.5-44-44.5-45 45,5. you see that 43.5 is half inch width but 1 inch vertical separation. 44 has half inch width and 3/4's vertical. 44.5 is half vertical and half inch width. 45 you start to see things open up and over pressure sighs. so you stop your ladder. You eliminate 45.5 right there. now you take your pest group. at 44.5 and you build a much more refined test at 2 tenths of a grain based around that. you go 44.1 5 rounds. 44.3 5rounds. 44.5 5 rounds and 44.7 5 rounds. I wouldn't doo the 44.9 as it is to close to were things start opening up. so now you round this test in the Optimal charge wait theory and you will see the barrel moving as the point of center in each group is found. you take the 3 closest groups pick the middle that will give you a margin of error in you equipment and expedite charging cases. and not having to way every charge. Hence optimal charge weight test. throw your powder if your with in + or - 2 tenths of a grain you know that round will be with in your group. look at 8541 tactical video on RUclips and the video is ladder test redux he does a lot of explaining. on this subject. he also has a OCW video also.
yeah i start at .5 then after i find a spot to look at start .3 to finalize development but thats at 300 cause whe i start the .5 process i can have a 3ft vertical string from charge weights of 3-4 grains difference i cant imagine how large a piece of paper id need to do it at 600 at least when i first start the process after i narrow it down on round 2 600 is where i shoot
A little late to the game here, but I have something to add. 1). I think 400 yards is probably too far away for ladder testing with such a light projectile like you are using here. We use 400 yards and it works GREAT for .50BMG ladder testing, but since our projos have over double the BC of your 6.5 ones (along with 6.5X the mass!), wind makes very little changes to them, even at 400. 2). Why are you shooting so many rounds of the same load on your ladder target? Traditionally, we load a single round of differing charge weights and fire them all up "the ladder" looking for the respective loads that "group", even though the powder levels in all of them are slightly different (for 6.5G I'd usually go @1% diff. for such a small case/fast powder). Then, you pick a load which falls within the ones that "group" (I personally usually pick a load which is on the higher/heavier powder charge weight end of those rounds) to do more confirmation of being a "sweet spot" by loading multiple rounds of it and then firing that one load for "group" all by itself. I am in the process of building a 6.5 Grendel AR right now, and I think I'm going to use 100, maybe 200 yards max. to ladder test that one at.
Did you have that chrono strapped to the barrel??? Take it off ... and shoot a string ... once you know your velocities there's no need to have it on the barrel.. if you really HAVE to have it ... use a skyscreen....
That's an anti cant bubble to keep you from shooting left or right at long distance sir . bubble should be split in half by the line to be perfect amd no cant of the shot
I use my anti cant level mounted on my scope forward of the turrets so I can see the bubble on the left and far enough from my eye to be seen clearly without breaking my cheek weld. The usual innovators will always find some other place less useful to sell their wares.
my guns i did many ladder test i notice tight patterns then turns into a big triangle then turns intos 2 touching 1 flyer type patterns the triangle shoots 1.2 moa but it does it at all distances but the lower tighter loads always strings and moves around and sloppy
Don't pay attention to your groups on the ladder look at the velocity for me on your ocw the flat spot in your velocity was top right groups that's where I'd play with oal where you had the 5 SD to the 8 SD can't remember the charge weights seems like .1 to .3 so I'd load it at .2
I noticed you had your magnetospeed chrono attached directly to the barrel on your OCW (maybe the ladder test too?). That can negatively affect barrel harmonics and move your accuracy node far enough to lead you to choose a bad load. I'd recommend shooting the OCW and then chronoing it. Ive also tried the sharpie bullet thing, didnt work for me either.
+TheYoungPatriot Yup, that's a good point that I should have addressed in the video. I have a video planned to investigate that topic. This was more about playing around with the Ladder method and collecting velocity data for the powder. I won't be doing any serious load development until my suppressor gets out of jail in a month or two.
... no comments on accuracy nodes? No comments about vertical spred(What your looking for in ladder test) 400 is borderline to short... 300 bare minimum... 600 where I have seen most ladders done... 9 is your best of those loads
11:55 bullet is very very slow, can literally pause it with the bullet mid field, cought it with my eye in real time, must be the atmosphere iv never "accidentally" seen bullets that clear on film
I kinda disagree with your interpretation of the groups. Those groups tell the story. The 26.9 was your sweet spot at the temperature. if you are going to get better groups that that you will have to start keeping temperature logs with the data. The termperature affects the velocity that much with affects your verticle spread. The horivonal spread is wind. Now go to 26.9 grs at the same temperature you were same OAL same powder same bullet same case and work on your shooting abality.
Higher velocity does not mean higher impact. That's only true if u remove the variable of barrel harmonics. Ur OCW is essentially going to be the load that causes the bullet to exit the barrel when it is at either the peak or valley of its whip. Thats where it pauses to go back the other direction. The ladder test is showing you this whipping action on paper. Group 9 is the peak of your whip and thus the best group, this is proven by the fact that group 10 starts going back down.
Love that you could see the bullet in the 400yd footage.
Johnny, your dedication is infectious! Have you thought if a much more efficient way of load dev that works really well? One that gets you a node within 29 shots that anyone can do? I saw it covered by an Eric Cortina video and it works like this: use QL or similar software(I recommend Gordon’s Reloading Tool). Go out and pick your min and max liads and keep max to about 75% of the way up the ladder. Load 2 bullets at each of 10 increments. Pick a seating depth that allows mag feed and is about 20 to 30 thou off lands when barrel was new…don’t chase the lands!
Now shoot each if ten steps in 0.2gr intervals. That’s plenty. Shoot each two at a different dot drawn onto one piece of paper. Look for one or more groups of 2 that make bug holes with no or little vertical. Discard any with spread or vertical. Those are your nodes. You may find two or three within adjacent loads. Pick the middle one. Now go shoot 5 at that load. Tighten groups be working back in 3 thou steps on seating. Do not vary powder. Pick the depth that shows the tightest circular shaped group and not the tighten weather report line. Your done. It works, is simple and more reliable than ocw . You need to pick a node where varying barrel time by seating out or in more than a few thou makes no difference to poi or group. This allows a stable node where varying charge or seating a little gives similar mv and poi and group. It allows tolerance to temp changes. Sd should also be low enough . Job done. Avoid nodes that are hot. They destroy barrel life and reduce safety . Don’t do it!
Mate, g'day from Australia. I have to say Paul C ( 6 comments bellow ) is all over it. I used Eric Cortina's method for my little Grendel Hog killer and it worked ridiculously well.
Three steps mate.
1: Pay for good brass, don't be cheap and anneal it.
2: Use that chronograph to map a string of loads at .2 grain increments for let's say ten shots. start 2 grains below max, that will give you plenty of loads to watch for pressure signs. Find the flat spots in the graph where the feet per second doesn't change much, pick one ( there might be a couple ). Then leave the powder charge alone. Groups are not important at this stage, just velocity.
3: Start moving that bullet jump back by about 3 thousandths increments, shooting groups. 3 shots or 5, it"s up to you. It won't take you long to find the sweet spot. I shot 5 groups of 4 at 3 thou increments and am now shooting .3 to .4 inch 4 shot groups with cheap Speer TNT's.
Eric said " Bullet jump will make a bad powder load look good and a good powder load look excellent." So find the powder load first, then chase the bullet jump. I started at about 20 thou off the lands and found my sweet spot at 29 to 35 thou off the lands.
I agree with PJS50, my understanding of the ladder test is to find nodes where the changes in adjacent load grain weights does not change velocity much. Then explore those nodes for SD, ES and accuracy. The ladder test helps to find a good area to investigate in a particular load without blowing through all your supplies. I'm writing this in 2021 when all reloading supplies are very hard to come by and costs are at a premium!
I believe you're analyzing your ladder test like an OCW. For the ladder shoot 1 charge weight each on it's own target. So then you end up with 3 different targets. Then look for vertical groups from consecutive loads to find a sweet spot, in the harmonics. Pick the middle charge. Then you can fine tune it at the 100 yd range over a chrono, and seating depth.
Another great video. I really like that new mount. The Vortex switch makes it hard to see a level also. I always glance just before shooting, just to make sure I'm as level as possible.
Inefficient! Ineffective!
The work ups in my gun looks like the 27.5 grains of AR Comp is in the sweet spot. Gonna load up another large batch and confirm but the Velocity, SD, and group size were very consistent from 27.0 to 28.0 range with the best groups being 27.5. I did my work ups in .5 grain increments, going to drop down to .3 grains and concentrate on the range that showed promise. I'm shooting a 22" barrel, 1:8 twist. Love this caliber. Really like your videos and content, very helpful.
I would work with the 4th powder charge. The 3rd, 4th, and 5th all look decent with great SD's to boot! When I develop I'm not as worried about vertical height as I am horizontals. If you can stack those holes it's getting down to fine tuning everything and you are getting close with 4 & 5. Making sure powder charges are equal, messing with seating, barrel heat, and working on your shooting skills will tighten that charge up. Good luck. Looks like a nice set up. I'm starting a build and will be doing a series on making your own barrel and installing a barrel extension. Will be doing a 6.5 Grendel so that's how I found your video!
Thanks for stopping by! I've subscribed and look forward to seeing your project.
Blew my mind with the graphics. Superb.
I'd load some charges around 27.3 +/- a few grains and take it to 300+ yards. Shrink the groups by adjusting your seating depth, no? You have the most consistant vertical poi in that range with single digits SD. Seems like you found it!
Thank you for your series of videos load data 6.5 Grendel! I've been out of the scene for some years, and thing s has past me buy in the world of reloading. So what is OWC and Ladder? I started reloading 1990/01, and because of getting into archery in 2007. I stopped shooting and reloading.
Good stuff. bullet velocity is not always going to show increased height in impact with increased velocity. barrel harmonics and bullet whip have a large part in that. not to mention the chrono may affect your data some too. I'd suggest doing the work up w/o the chrono and find a good load and then chrono it after. sometimes increased velocity can actually have lower bullet strikes depending where in the muzzle is pointed when the bullet exits the muzzle due to the barrel harmonics. (probably not the best way to explain it).
I do like that upper receiver! Looks Very solid!
Hey Johnny! As I'm looking a your video (part 2, 6.5 grendel OCW), I must agree that without you noting the COAL variations during seating the OCW is a head scratcher, but considering the COAL variations during seating is very thought provoking and could hold keys to decrypting the OCW compiled......m
.....
Try shooting one round at each charge weight. Hopefully you will identify a cluster of shots that indicate an accuracy node. Then take those loads and find tune them at 100 yards. Then go back to 400 yards to confirm the best one at distance. I'm no expert, but this seems like it may work.
Your getting pretty stressed about this! What is your intended use for this rifle? Hunting or precision shooting? Your on the right track. Like PMS mentioned 3-5 are good medium loads that won't put a lot of stress on your rifle. If you are trying to get max distance then go with 28 gr. range but make sure you do that when it is hot since it is at the max range. Chill and have fun with it!
love seeing that vapor trail
As I'm still researching before I do any load dev, I've heard the 6.5 g needs a couple hundred yrs to "settle in" and then the groups tighten back up. I know it sounded counter intuitive to me, but those long distance guys seem to believe in the concept. I remember watching vapor trails for the first time and it blowing my mind how much motion there was. I guess I was expecting lasers. It's a bit of a black art otherwise there would only be one ammo, I guess.
Final form? Hahahaha. No AR is ever in its final form. Including this one :P
What camera did you use for your range sessions? First time I've ever been able to see the bullet in a video.
that was cool to see the bullet fly when shooting at the steel
I've just started loading for my Grendel. I went with a 120 gr. TTSX. I worked up to the max load from the Barnes website with 27 gr.RL-15. My velocities were 100fps lower than listed (2400+-). The only difference in the load was that I used Winchester SRP instead of Federal. I can't find Federals! No signs of pressure. I buzzed the web and found a lot of load data that called for CCI 450 SMP. Do you ever use SMPs? I found a load from Alexander Arms that calls for 30 gr. of 748 with the 450. I'm a little nervous about that one but I'm going to try it. Any advice before I blow myself up?
You'll be fine. The difference with magnum primers isn't all that huge. Just don't jump straight to the max load. Start low and work it up.
Did you leave the chronograph on your barrel during the ladder test? If so your missing the point of the test. Ladder testing has do with barrel harmonics and finding nods. I look at 1-2 is maybe and 8-9-10 for sure.
Anti cant level nice addition sir. Have one on My 223 24 in target upper.mine is on the rail under the SCOPE.
Interesting.Ladder. In the loop. grouping 1,2,3 then 4,5,6 then 7,8,9 and 10, each of these sets moved up and to the right, then in each subsequent set the first shot moved back down and to the left. The slope of 7,8,9 was much lower than 1,2,3 or 4,5,6. Just an observation I like the OCW method better.
Ladder test should be one shot per charge all on one target. I never found it of much use. Those who are in favor of it tell me to look only at the vertical shifts. That is only true if barrel vibrations, both axially and radially didn't happen. The third method of selecting a 'best charge' makes more sense to me. (I still prefer OCW) That third method is to shoot over the chrony and use velocity grouping instead.
Ahhh I pick nine. I have typed out a bunch of responses to this comparing barrel harmonics to octaves in music. each octave has the same notes. so your looking for that one note that you rifle sounds the best in. ladder test are usually done in a much more course test. half grain increments think about this as the octave. So once you find what side of the octave your rifle shoots best out now you looking for the note you want to play in. so you run a test of five groups half grain each. 43.5-44-44.5-45 45,5. you see that 43.5 is half inch width but 1 inch vertical separation. 44 has half inch width and 3/4's vertical. 44.5 is half vertical and half inch width. 45 you start to see things open up and over pressure sighs. so you stop your ladder. You eliminate 45.5 right there. now you take your pest group. at 44.5 and you build a much more refined test at 2 tenths of a grain based around that. you go 44.1 5 rounds. 44.3 5rounds. 44.5 5 rounds and 44.7 5 rounds. I wouldn't doo the 44.9 as it is to close to were things start opening up. so now you round this test in the Optimal charge wait theory and you will see the barrel moving as the point of center in each group is found. you take the 3 closest groups pick the middle that will give you a margin of error in you equipment and expedite charging cases. and not having to way every charge. Hence optimal charge weight test. throw your powder if your with in + or - 2 tenths of a grain you know that round will be with in your group. look at 8541 tactical video on RUclips and the video is ladder test redux he does a lot of explaining. on this subject. he also has a OCW video also.
yeah i start at .5 then after i find a spot to look at start .3 to finalize development but thats at 300 cause whe i start the .5 process i can have a 3ft vertical string from charge weights of 3-4 grains difference i cant imagine how large a piece of paper id need to do it at 600 at least when i first start the process after i narrow it down on round 2 600 is where i shoot
A little late to the game here, but I have something to add. 1). I think 400 yards is probably too far away for ladder testing with such a light projectile like you are using here. We use 400 yards and it works GREAT for .50BMG ladder testing, but since our projos have over double the BC of your 6.5 ones (along with 6.5X the mass!), wind makes very little changes to them, even at 400. 2). Why are you shooting so many rounds of the same load on your ladder target? Traditionally, we load a single round of differing charge weights and fire them all up "the ladder" looking for the respective loads that "group", even though the powder levels in all of them are slightly different (for 6.5G I'd usually go @1% diff. for such a small case/fast powder). Then, you pick a load which falls within the ones that "group" (I personally usually pick a load which is on the higher/heavier powder charge weight end of those rounds) to do more confirmation of being a "sweet spot" by loading multiple rounds of it and then firing that one load for "group" all by itself. I am in the process of building a 6.5 Grendel AR right now, and I think I'm going to use 100, maybe 200 yards max. to ladder test that one at.
Oh and who makes that scope mount, Odd mount? I couldn't quite understand you. Looks nice.
Aadmount from Aadland Engineering. aadmount.com/
If I understand it correctly, the more accurate your rifle, the longer the distance you need for this kind of test.
Kool....I have ar comp.... and a 20 inch 6.5 grendel barrel
Did you have that chrono strapped to the barrel??? Take it off ... and shoot a string ... once you know your velocities there's no need to have it on the barrel.. if you really HAVE to have it ... use a skyscreen....
26.5 g is what i would narrow my search around
That's an anti cant bubble to keep you from shooting left or right at long distance sir . bubble should be split in half by the line to be perfect amd no cant of the shot
I use my anti cant level mounted on my scope forward of the turrets so I can see the bubble on the left and far enough from my eye to be seen clearly without breaking my cheek weld. The usual innovators will always find some other place less useful to sell their wares.
my guns i did many ladder test i notice tight patterns then turns into a big triangle then turns intos 2 touching 1 flyer type patterns the triangle shoots 1.2 moa but it does it at all distances but the lower tighter loads always strings and moves around and sloppy
So far is your best load 26.9gr of AR Comp?
Don't pay attention to your groups on the ladder look at the velocity for me on your ocw the flat spot in your velocity was top right groups that's where I'd play with oal where you had the 5 SD to the 8 SD can't remember the charge weights seems like .1 to .3 so I'd load it at .2
What COAL did you shot those with?
I noticed you had your magnetospeed chrono attached directly to the barrel on your OCW (maybe the ladder test too?). That can negatively affect barrel harmonics and move your accuracy node far enough to lead you to choose a bad load. I'd recommend shooting the OCW and then chronoing it. Ive also tried the sharpie bullet thing, didnt work for me either.
+TheYoungPatriot Yup, that's a good point that I should have addressed in the video. I have a video planned to investigate that topic. This was more about playing around with the Ladder method and collecting velocity data for the powder. I won't be doing any serious load development until my suppressor gets out of jail in a month or two.
+My Reloading Bench yeah that's probably a good idea. I don't know why but ladder tests don't seem to be really effective for me. I prefer OCW.
... no comments on accuracy nodes? No comments about vertical spred(What your looking for in ladder test) 400 is borderline to short... 300 bare minimum... 600 where I have seen most ladders done...
9 is your best of those loads
What did you end up settling on?
What Grendel mags do you use
u should really put some 300wm videos on here man... I know u have one lol..
Checkmate isis!!!! Hahaha
11:55 bullet is very very slow, can literally pause it with the bullet mid field, cought it with my eye in real time, must be the atmosphere iv never "accidentally" seen bullets that clear on film
should have watched whole video first
You may try Accurate 2495BR www.shootingtimes.com/reloading/handloading-allows-6-5mm-grendel-shine/
I kinda disagree with your interpretation of the groups. Those groups tell the story. The 26.9 was your sweet spot at the temperature. if you are going to get better groups that that you will have to start keeping temperature logs with the data. The termperature affects the velocity that much with affects your verticle spread. The horivonal spread is wind. Now go to 26.9 grs at the same temperature you were same OAL same powder same bullet same case and work on your shooting abality.
You are not doing your ocw correctly