LR308 DPMS Pattern High Pressure vs Standard Bolt!
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- Опубликовано: 29 авг 2024
- The reason for the 'High Pressure" design was to give more support at the primer area of the cartridge. The smaller firing pin diameter was to reduce primer cratering, piercing and popped primers especially for the 6.5 CM rounds. This was less of a problem with 308.
![[Don't Try This] Pushing the 308 Win to 300 Win Mag (Bat Machine, Alpha Munitions)](http://i.ytimg.com/vi/uXkmcpk7Brc/mqdefault.jpg)
Makes me feel lucky. Had a Armalite AR 10 7.62×51 fall in my lap. Love it.
Knowing what I know now the next one will be much easier. From what I can tell even if you buy everything from the same brand there may be obstacles. Noticeable differences and incompatibility even between the AR-10B and AR-10A pattern. Was it worth it to assemble one... jury is still out! Lol!
Oh, just wait until you run their new dual ejector bolts lol from what I was told the single AR10/LR308 will come with the dual now, phasing out the single. The dual was stiff and in dire need of breaking in, I had 3 fail to fires back to back once it got hot. cartridge wasn't seating properly, firing pin not striking the primer well enough. Had to let the bolt cool down, then the problem went away. When I get home I'll take it all apart and clean the factory oil and crud out, lube it with my oil I run, and take her back out there and hopefully I don't have these issues again. Wilson can be a bear to deal with regarding the parts , but, their customer service is top tier. They will make it right.
Not sure if I told you, I was shooting an M80 round, and the firing pin went right through the primer, nice clean hole and could see daylight. didn't knock the primer out just punctured a clean hole lol.
Do you think my under gassing issue could be from the 1 piece gas ring? Ive read with the AR15's they work well but the AR10/LR308's people were having hell with them.
One ejector hole is enough! Lol! Wilson does have great customer service and has resolved issues very quickly. With the D&H magazine problems I was having that I had purchased from them they offered a full refund or swap them out from a different manufacturer. Even if it was more money and all return costs paid for. They were very quick on this firing pin issue too! Just wish I didn't have to keep using their customer service! Lol! Don't know if your one piece gas ring is an issue but the one experience I had with mine was a brutal amount of friction and after 500 manual cycles by hand it wasn't getting any better. Replaced it with the three ring set-up and the disturbance in the force was mitigated!
@@peteregger7928 lol yeah, WC is stellar in that aspect. I was having an issue with their serious delays in responding, but I sent in a complaint on a friday evening, that monday it was heard lima charlie. Never again did I have any delays in responses or call backs. I'm going to run my one ounce lighter lantac carrier with the WC bolt thats head spaced to my barrel and see if that will help lock the bolt back on last round and actually cycle and feed rounds. I had the fanciest semi auto bolt action on the range that day lol
@@DesertMariner2007 1 oz is quite a bit. I mentioned it in a couple of the build videos but the WC Nitride is a real heavy weight at 18.6 oz. The light weight AERO buffer at 3.8 oz I think helps with mine.
The guy from Wilson combat with the wierd name? Massad Ayoub! 😂
Ha! Ha! Correct!
Large frame pew school again, love it. Thanks for all the valuable info.
Thanks Malcolm! Still learning! The lack of description and specifications by a lot of these companies has made it a little challenging at times but I think I'm almost there!
@@peteregger7928 We're all following behind you. You're carrying the torch in the dark. I'm surprised that WC handled that whole thing initially the way they did. They are usually top-notch with everything else. Maybe they are as confused with the platform as everyone else lol
@@malcolmpalm The first guy I emailed was clueless before placing the order. The second guy knew what was going on and got the new firing pin delivered to my house on day five. If you go to their site you will see that they offer little to nothing for spare 308 BCG parts. Descriptions and specifications are not stellar either. Yes. I think you are right about their own confusion which then becomes mine! Lol!
Great video! You actually covered both the pin size and pin hole size details. Very clear overview.
Thanks! The two LR308's that I recently put together were a learning experience for sure!
Pete, you almost got to the point that you were perturbed! Good to see you began building a .308.
Where have you been? Thanks Alanna!
You asked where I have been! As I watched you building Ar15's one after another after another I began to get a little bored. In my own genre I have been shooting and buying different types of weapons...Tavor X-95, Tavor 7 and I also branched out to build a 308 AR. When I checked in on your channel again, you were still building more AR15's. I began looking at other channels for things that were more of interest.
I can honestly say that I have found your '308' videos more interesting since it dovetails with what I have been doing of late. Up here, Washington state, the riding in the winter is a bit too cold to be enjoyable...so we ride when it gets warmer. Your interests match with mine...you are building a vintage Camaro, I have built a 66 Mustang, firearms are another interest we share... of course we both enjoy off-road riding...I also ride street...I have made the trip from West coast to East coast and back 3 times on my BMW! Overall I believe you have more disposable income than do I! Many things you speak to I already know, but often I will find a few worthwhile "nuggets" that you present. I have a greater drive towards piston designs than you...my favorite rifle is my LWRCI M6 IC. A great shooter! After watching you deal with many miles of desert terrain, I believe my typical rides up here have more variety of trails. Not that watching your videos makes me a vicarious expert! I look forward to your next presentation!
@@alannaofrann6767 Ouch! Lol!
I have the KAK dual ejector bcg and best i can tell it looks exactly the same as both of those. Measuring the firing pin and channel i get the same dimensions as the “standard” spec bolt. I agree with you all this crap is complicated i got a low shelf hand guard when i should have got a high just because i had no clue there was a difference. I don’t have nor do i plan to have irons on the gun so i don’t really care,if i change my mind one day though I’ll have to replace the handguard or figure out a spacer.
I need to pick up some spare bcg parts,now i know there is a difference hopefully i don’t order the wrong crap 😂
A lot of these companies will absolutely make sure you order the wrong crap! Lol!
@@peteregger7928 yeah cause most people are probably like me and are too lazy to send it back 😂. I do wish the large frame guns
Were like the small frames ones. What’s the biggest difference in ar15s? Fsp guns vs non fsp? Lol
Great content thanks Pete. I went through this back in the summer and just thought I got an out of spec bolt. They refused to replace it bc I bought it from optic planet
Years ago I made a couple of Optics Planet purchases. At one time they had competitive prices but not so much anymore. Their shipping time for me was really slow and one of the optics showed in stock but wasn't. They gave me a few shipping dates that never happened when they said it would. That one took weeks! Thanks for watching and commenting!
do you have links to these high pressure bolts?
does the odin works bolt have standard 3 gas rings and pass the stand up test? or like the jp enterprise that only has one gas ring? thanks for the vid!
Some manufacturers call them Magnum bolts but the majority refer to them as "High Pressure". The Odin Works and Wilson Combat complete BCG's come with three rings. The nitrided Wilson Combat BCG's that I ordered had the high pressure bolts and firing pins. Their replacement parts like the firing pin are standard and what they call MilSpec 308 and will not work on a high pressure bolt. WC still doesn't list high pressure bolts or individual bolt replacement parts so watch out for that! I have no idea why WC is so dorked up on some of their 308 stuff. KAK is another source for high pressure parts but I think all of their 308 bolts use the double ejector. YT does not allow redirect links.
Which BCG is cheaper?
Wilson Combat is now up to $290! Odin Works was $210 at Sportsmans Warehouse. With a military discount I got the Odin Works for $185.
Always Somethin Again Makes Me Wanna Never Build an AR-10 or DPMS Pattern Rifle I’m Going to Stick With AR-15’s 😩😩😩😩Pete
Ha! Ha! I'm with you! Even when I myself have most of it figured out a lot of these help representatives at these firearm companies are clueless about their own products!
lol i hear you, sometimes wish I would have just ordered the Springfield Saint 308 and saved myself a lot of headache. but noooooooo, I wanted to build one.
What’s the point of a ‘high pressure’ bolt?
Is everybody firing Mk 316 MOD 0 these days?
And wouldn’t the smaller pin prick be more likely to cause a ruptured primer?
I wondered that myself? Seems most of the problem was the firing pin hole being to big and not providing enough support around the primer.
Question for you, with the replacement pin you got that had the thicker tapered end right before the tip, did you measure the pin protrusion? Basically measure depth from top of bolt to base, then top of bolt to pin, then subtract. The difference should get you the pin protrusion.
I did not measure protrusion for the high pressure BCG. I wasn't able to see what would happen with the high pressure firing pin in a standard bolt because I don't have any standard bolts. The range I have come across for 308 Win is .045" - .060" and I believe that's the same for 7.62 NATO for both standard and high pressure bolts but I'm not 100% on this.
I was wondering what the pin protrusion is on your high pressure bolt with the tapered end replacement pin (the one they sent you that had oil). I noticed the tip is a little shorter on the replacement they sent you. It looks like it would be less than .045”. Have you fired it with that replacement pin? Also, are both your BCG’s using the same style of pin (like the oily replacement they sent you)? I don’t think you showed the pin in your other BCG?
Yes, both my Wilson Combat and Odin Works high pressure BCG's have been test fired with the pins they came with and looking good. I also purchased a spare firing pin from KAK in addition to the WC spare after these build videos and did a test fit for both but not measuring the protrusion or test firing on those. They looks good visually. I do have an old Bushmaster gage for my AR15's. It probably wouldn't hurt to have one for my LR308's. Unlikely I will build or buy anymore large caliber though.@@dadadadada4974
@@peteregger7928 Thanks for the replies and feedback. So did you test fire the pin you got in the bubble envelope (oiled one)? BTW, I subscribed and started watching your other videos! I like your commentary.
Thanks for subscribing! I haven't test fired the spares that I purchased only test fit them. Probably would be a good idea to test fire them but they looked okay in the bolts.@@dadadadada4974
Is Palmetto PA 10.... DPMS pattern l308?
I think there latest generation is but not positive. There is no real standard for DPMS LR308.
@@peteregger7928 I found out since posting this question that Palmetto PA10 gen 3 is DPMS gen 1.
Sorry for the later response. Something is going on with YT comment notifications. The last comment notification came in 6 days ago and then they all showed up today!@@tsafa
@@peteregger7928 no worries. I run Channel too so I know how it is.
I see the problem you are having getting parts for that high pressure BCG. I wouldn't do that. Need easy replacement parts. What are you doing that requires higher pressure ? Ever think the rest of the gun might not like high pressures ?
It's mostly naming convention and has less to do with actual pressure. The "High Pressure" design uses a smaller diameter firing pin and bolt firing pin hole. Primer flow and piercing of the primers was becoming an issue more so with 6.5 Creedmoor than 308 Win. NATO primers for 7.62 are thicker and weren't really a problem. Recently ran M80 White Box and was still getting some primer flow even with the "High Pressure" design bolt. It's insurance to keep your rifle reliable using cheaper or more hunting oriented rounds which use softer primers. More and more manufacturers are making their 308 bolts the "High Pressure" design. Odin Works, Wilson Combat, JP Rifles and many others. The problem with Wilson Combat is if you buy their complete 308 BCG you get the "High Pressure" design but their individual replacement firing pin and bolt is the standard design. As of right now they still don't have the "High Pressure" individual replacement parts listed although that's the design of their complete BCG's.
Never had primer issues while using standard samii ratings. What are you doing ? You had better have stronger parts throughout.
@@notsogreat123 If you do a search on "High Pressure" bolt designs for the large caliber AR type platforms you will maybe find someone that can explain better for you? It has little to do with actual pressure. It's a naming convention. I have failed you!
Ok I'll research high pressure. I'm just at a loss as to why you are seeing punctured primers. I have both 308 and 6.5 creed in the ar platform. Keeping within SAAMI specs I've never seen that unless I was way over charged.
@@notsogreat123 Only the Winchester White Box M80 was having primer flow problems. They did not use NATO primers that's for sure. I just went with the "High Pressure" designed bolts on these builds to get ahead of any potential issues. The improved BCG's cost the same so I figured why not.
Most likely Toolcraft
Probably one of the usual suspects! Lol! Would be nice to know for sure? Well, so long as it works! Thanks for watching and commenting!
Everyone says that nickel boron is the way to go with the bcg. Is that true? Nickel boron tends to be quite a bit more expensive than anything else. And I'm contemplating getting exactly that for all of my AR-15s and AR-10 weapons. But I'm asking around for opinions first.
I've read some of the research but I want to know about people's first-hand experiences...
I'm old school and actually prefer 8620 phosphate carriers and Carpenter 158 bolts but finding one of those in .308 that has a "High Pressure" bolt design is not easy. Not completely sold on Nitride for BCG's as they usually use 9310 steel bolts which requires very careful heat treatment. When done right they are supposed to be little stronger than C158 but are they actually getting done correctly? I don't have any experience with Nickel Boron. Can't say why just never wanted one?
No nickel boron here. All toolcraft nitrite or cryptic coatings nitrite. Check lug length for .314" recess for .125"