Page 2 of 2 FirstFirst 12
Results 11 to 15 of 15

Thread: 260 Rem popping primers on factory ammo

  1. #11
    Join Date
    Jan 2008
    Location
    Roaming
    Posts
    717
    Feedback Score
    0
    Quote Originally Posted by jwfuhrman View Post
    I'm hooked into 260 Remington pretty deep, bought into that caliber before 6.5 came out and I have so much brass AND a ton of factory loaded Gold Metal Match and Hornady ELD-M ammo for it that is why I use it.

    That being said, here's whats going on and I want to kinda run it passed the forum here to make sure I'm going in the right direction of thinking or if I'm WAYYYYYY out in left field.

    Les begin the trouble shooting below shall we.....
    ------------------------


    I purchased a Saturn Barrels 18in 260 Remington barrel with rifle length gas. At first I was having nothing but stove pipe/double feeds. Got an adjustable gas block and a DPMB Dual Extractor Bolt and that solved the issue of that. Damn gun runs at 7 clicks open unsuppressed and 1 click open suppressed on the gas block. I had this issue on all the platforms I've tried this barrel on so I'm pretty sure the barrel is way over gassed hence the adjustable gas block. I started noticing, especially when suppressed, that after about 10-15 rounds, when the rifle really starts to heat up, I'm literally popping every primer on every shot.

    Am I correct in thinking that this chamber is undersized an as the rifle builds up heat is causing massive pressure issues? All I have been shooting is factory loaded ammo that I got pre-insanity pricing via RSR Group and Davidsons, I got a couple thousand rounds of each. This issue happens with both the Federal Gold Medal Match 142gr ammo and Hornady 130gr ELD ammo.

    I need to get a Go/No Go gauge and a chamber reamer. Anyone know where I can find those?

    Just some info on the rifle itself. It is a DB10 that runs 100% with 308 barrel. I have 2 others in 308 that run absolutely amazing (granted, those both have the barrels replaced with Ballistic Advantage barrels and DPMS Dual Extractor Bolts) I've tested this 260 barrel on multiple other AR10 platforms with same results.
    Brownells or midway for gauges(243,260,308) all the same they may have reamers also. Blown primers can be a sign of excess headspace.
    AR15 Performance
    The 6.8 is the best choice for hunting deer and hogs with an AR15.

  2. #12
    Join Date
    May 2009
    Location
    Mid-Atlantic states
    Posts
    277
    Feedback Score
    13 (100%)
    Quote Originally Posted by constructor View Post
    Brownells or midway for gauges(243,260,308) all the same they may have reamers also. Blown primers can be a sign of excess headspace.
    Constructor, this seems almost counterintuitive to me; I would have thought it would be the other way around. Apparently I don't understand headspace (other than knowing it's important). I'd appreciate a short explanation on this if you have the time.

    Thanks in advance.


    -Rainman

  3. #13
    Join Date
    Jan 2008
    Location
    Roaming
    Posts
    717
    Feedback Score
    0
    Quote Originally Posted by rainman View Post
    Constructor, this seems almost counterintuitive to me; I would have thought it would be the other way around. Apparently I don't understand headspace (other than knowing it's important). I'd appreciate a short explanation on this if you have the time.

    Thanks in advance.


    -Rainman
    Extra length in the chamber means there is nothing to back up the primer, it blows out the rear.
    AR15 Performance
    The 6.8 is the best choice for hunting deer and hogs with an AR15.

  4. #14
    Join Date
    Feb 2012
    Posts
    87
    Feedback Score
    0

    260 Rem popping primers on factory ammo

    I had the same primer issue in one of my AR 10 platforms. I solved my issue by changing the bcg to a KAK BCG and used a JP high pressure bolt. I also switched to a heavy buffers from Heavy Buffers.com.

    It seemed to me to slow the process down and allow pressure to subside before the extraction and ejection process. Now, it runs any ammo, factory or hand load. I hope you get yours sorted out my friend.

  5. #15
    Join Date
    May 2009
    Location
    Mid-Atlantic states
    Posts
    277
    Feedback Score
    13 (100%)
    Quote Originally Posted by constructor View Post
    Extra length in the chamber means there is nothing to back up the primer, it blows out the rear.
    Thank you Constructor.


    -Rainman

Page 2 of 2 FirstFirst 12

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •