beachmaster Posted January 19, 2014 Report Share Posted January 19, 2014 I just fired my dpms platform ar308 today that was built by some bozo. I guess im the bozo for buying it. Anyways, I just replaced the entire buffer assembly, and I haven't been able to tighten the castle nut all the way. But out of 20 rounds of walmart zq1 Turkish ammo, 2 hailed to fire due to light primer strikes. Do I need a heavier hammer spring, or is the headspace off? Any advice is appreciated! Quote Link to comment Share on other sites More sharing options...
beachmaster Posted January 19, 2014 Author Report Share Posted January 19, 2014 (edited) To be clear, the very round in that picture was rechambered and fired, and it fired fine. The all rounds fired seemed to have good primer strikes. Edited January 19, 2014 by beachmaster Quote Link to comment Share on other sites More sharing options...
392heminut Posted January 19, 2014 Report Share Posted January 19, 2014 That first round looks like the bolt may not have been seated all the way. How many rounds have been put through the gun since it was built? Are you running the BCG well oiled? Quote Link to comment Share on other sites More sharing options...
beachmaster Posted January 19, 2014 Author Report Share Posted January 19, 2014 Everything has been well cleaned, and well oiled. I am thinking I am going to give all my parts an oil bath. All rounds that fired ejected about at the 3 o clock, and had what looked to me to be good primer strikes. Recoil was very light. I dont know how many rounds have been fired through the rifle. I dont think the original builder put many through. I have put 20 rnds. The ammo I am using is Turkish zq1 from walmart. $17 a box. The two rounds that failed to fire had light primer strikes. This is all I know. I hope it helps! Quote Link to comment Share on other sites More sharing options...
Rsquared Posted January 19, 2014 Report Share Posted January 19, 2014 20 rounds is way too early to tell. Keep everything wet as hell and drive another 100 or so through that bad boy and see if she loosens up a little (starts firing more consistently that is). Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted January 19, 2014 Report Share Posted January 19, 2014 Remember that mil surplus ammo (it doesn't matter what caliber you pick) is designed to be stored and transported in large metal ammo cans. Because of this, the mil primers are a bit thicker and stronger than a commercial primer, due to the banging around inside the cans. This is a contributing factor to why "mil spec" triggers are generally so rough and tough. Those heavier hammer springs are needed for popping the heavy duty primers. I'll bet if you grabbed some off-the-shelf .308 commercial ammo from <insert your LGS here>, you would be absolutely fine. If you're looking for an inexpensive trigger assembly upgrade, take a look at the ALG triggers. They are made by Geissele and designed for to be a "mil-spec" upgrade. Nothing too fancy, but you can often grab one for $35-$50 depending on the deal. Quote Link to comment Share on other sites More sharing options...
beachmaster Posted January 19, 2014 Author Report Share Posted January 19, 2014 I added a wolf extra power hammer spring from brownells... it was like $2. What do you think my chances of this helping? Quote Link to comment Share on other sites More sharing options...
washguy Posted January 19, 2014 Report Share Posted January 19, 2014 no worries....just the turkey ammo.....you have more pressing problems in your other thread....with the stovepipe and cycling issues you have....light primer strikes on crap ammo isnt a biggie...:) Wash Quote Link to comment Share on other sites More sharing options...
beachmaster Posted January 19, 2014 Author Report Share Posted January 19, 2014 Good call. I dont know how much $ im going to throw at this before i decide to sell it and get the new gii:/ Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted January 19, 2014 Report Share Posted January 19, 2014 Good call. I dont know how much $ im going to throw at this before i decide to sell it and get the new gii:/ Ah fukk it! You done said it already. You might as well sack up and pull the proverbial trigger. That GII is all you now. Quote Link to comment Share on other sites More sharing options...
Rsquared Posted January 20, 2014 Report Share Posted January 20, 2014 And I'm labeled as an enabler..................................... Quote Link to comment Share on other sites More sharing options...
Matt.Cross Posted January 20, 2014 Report Share Posted January 20, 2014 And I'm labeled as an enabler..................................... That's our polite term for you, please don't make us break out the cut-and-dried on you... :enguard: Quote Link to comment Share on other sites More sharing options...
98Z5V Posted January 21, 2014 Report Share Posted January 21, 2014 $hit, he needs some warnings. Just Because. :banana: I hardly do anything around here, and I've got FOUR. Thank you, Rob. :fawkdance: Quote Link to comment Share on other sites More sharing options...
392heminut Posted January 22, 2014 Report Share Posted January 22, 2014 I hardly do anything around here, and I've got FOUR. ROFLMFAO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
78transamlvr Posted June 27, 2014 Report Share Posted June 27, 2014 Your cheapest fix is get a basic ar 15 trigger kit that you like. replace trigger trigger spring and keep your hammer and replace hammer spring. The dpms units are a bit weak and long pulls. You can use a cmng I prefer the FN kits myself. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted June 27, 2014 Report Share Posted June 27, 2014 Your cheapest fix is get a basic ar 15 trigger kit that you like. replace trigger trigger spring and keep your hammer and replace hammer spring. The dpms units are a bit weak and long pulls. You can use a cmng I prefer the FN kits myself. Not really, man - the real fix is to break it in with a couple hundred rounds of .308 Winchester commercial off-the-shelf ammo, with the upper receiver wet with lube, and get the function of the rifle down. After that, move to some military 7.62x51 ammo, and have at it. These big fuckers need to be broken in, and parts meshed. Bearing surfaces on the BCG, inside the upper receiver, bolt lugs-to-barrel extension - all that stuff needs to be properly pounded into place, whilst wet with lube. Hell, even magazines need to be broken in - don't go load your brand new 20-rd mag with 20 rounds, and expect perfection. Load light in the mags, break those bastards in, too. These things ain't AR-15s... Quote Link to comment Share on other sites More sharing options...
Rsquared Posted June 28, 2014 Report Share Posted June 28, 2014 <thumbsup> +1. When the man is right...............................the man is right. Quote Link to comment Share on other sites More sharing options...
sketch Posted June 28, 2014 Report Share Posted June 28, 2014 + 1 on mags thanks 98 I'm thinking load up 10/of a20 for a few weeks and let it set? Quote Link to comment Share on other sites More sharing options...
jamesfnbond Posted November 29, 2014 Report Share Posted November 29, 2014 I also have a light primer strike problem with a new dpms lr 308 upper. Started immediately today with first round as I started to break in the 24 inch stainless bull barrell. FTF because of light primer strikes every other round. Cycles fine, ejects land at about 10 feet at 2:OO Loading by hand single hornady match 168 grain ammo. Gave up after 8 rounds. Silent capture buffer assembly. Jard #3 trigger. Prs stock. Cmmg LPK. Detroit Gunworks lower. Took it home stripped it down scrubbed everything with Ballistol lubed it up and reassembled. Try again next week. I'm gonna lube the livin bejesus out of it this time. Also JP says in their literature you might have to add a quarter as an extention in the buffer tube or a different spring which they sell. I'm hoping it's just a break in problem with the BCG and the extra lube will help. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted November 30, 2014 Report Share Posted November 30, 2014 (edited) How do you know your getting light primer strikes ? FTF , Failure to feed or Failure to fire ? The rifle fires, after you hand load the cartridge in the chamber & dropped the BCG ? Just dropping the BCG on a cartridge in the chamber will more than likely produce an indentation on the primer . Follow JP"s advice or get there spring , to start out with. If the BCG is not fully driven back far enough & the BC is feeding the cartridge from the magazine , instead of the Bolt , that is one circumstance that would cause FTF ( failure to feed ) & it would not be the first I have heard from that Captured Spring assembly . Edited November 30, 2014 by survivalshop Quote Link to comment Share on other sites More sharing options...
jamesfnbond Posted December 5, 2014 Report Share Posted December 5, 2014 Good questions and points. The rifle fires sometimes when I hand load a cartridge and drop the bcg. When it does the spent primer has a nice healthy dent in it. When it dosnt fire the primer has a small shallow pin prick dent in it. Good point about the indentation on the primer from just dropping the bcg on it. Anyway I went back out today after lubing it up good and working the action about 50 times and dry firing the rifle. Big improvement in that there were a lot less of failure to fire. But I had to work the action a couple times every time before I fired it or the ft fire would start again. This is all going on as I'm following DPMS barrel break in procedure so I havent tried putting muliple rounds through it useing a magazine. That's up on the next trip out. Appreciate and value your opinion. Quote Link to comment Share on other sites More sharing options...
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