Load DataRotoMetals2RepackboxWideners
MidSouth Shooters SupplyReloading EverythingTitan ReloadingInline Fabrication
Lee Precision
Page 3 of 3 FirstFirst 123
Results 41 to 45 of 45

Thread: AR10 overpressure signs with factory ammo

  1. #41
    Boolit Grand Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    10,572
    Torn rims are from extractor, head dents from the ejector pin. Both can be caused by early bolt unlock. Haven't had a CCI LRP (#200) primer pierced yet. I don't use 308 Fed brass (or ammo), toss any I find. Now that you got the rifle checked out, get some decent Win/Rem hunting ammo and try it.
    Whatever!

  2. #42
    Boolit Master sawinredneck's Avatar
    Join Date
    Mar 2016
    Location
    Wichita KS
    Posts
    778
    Quote Originally Posted by popper View Post
    Torn rims are from extractor, head dents from the ejector pin. Both can be caused by early bolt unlock. Haven't had a CCI LRP (#200) primer pierced yet. I don't use 308 Fed brass (or ammo), toss any I find. Now that you got the rifle checked out, get some decent Win/Rem hunting ammo and try it.
    What problems did you have with Fedral loads?
    Quote Originally Posted by sniper View Post
    Irish Proverb: Never approach a Bull from the front, a horse from the rear, or an Idiot from any direction!

  3. #43
    Boolit Buddy
    Join Date
    Aug 2010
    Location
    San Antonio, Texas
    Posts
    416
    swainredneck, Original problem was expanded primer pockets, lost primers etc. It was fed red label 150gr fmj so it should be a good solid load. Having the bolt close on a no go gauge for a new barrel is pretty much a no no so I need to talk to Brownell's and see what we can come up with. So the ammo may just be a symptom and not the problem or I got lucky and have two problems at once.

  4. #44
    Boolit Buddy
    Join Date
    Aug 2010
    Location
    San Antonio, Texas
    Posts
    416
    OK this should be the final update, at least I'm calling things good. I got the replacement barrel from Brownell's also went ahead and got a set of headspace gauges and a new DPMS style bolt. Got everything put back together and no-go will not close in chamber. So far so good. Finally got a chance to shoot it, working sucks but so does not working, tried some LC match, don't remember what year. Normal ejection, primer a little flat but still in the case and showing some radius to the edge of the primer. Same results with some mil-surplus M80 ball. Fired one round of Fed. Pressure signs big time. Tried one round in my M1A and still showed a little warm. Extractor rub on the case head, primer had almost no radius to it.

    I broke down 3 rounds of the Fed and weighted the bullets and powder. The bullets went from 149.7 to about 150.2 gr. the powder charge was right around 45 gr IIRC but also had about 0.5 gr spread or a little better. The powder looked ok, no smell or red powder. It looked about like 3F black powder as far as grain size and color. About the size of salt or a little coarser. I know our powders and factory powders are two different animals but according to the Sierra book the closest powder would be H335. I don't know what H335 looks like but since I have 38 rounds I'm just going to break them down fertilize the grass with the powder and reload with a known good load. Lesson learned is try one round first in the rifle and check the case even though it's factory ammo. Thanks for everybody's input.

  5. #45
    Boolit Grand Master Nobade's Avatar
    Join Date
    May 2005
    Location
    SE WV
    Posts
    6,215
    Glad to hear that you got it fixed!

Page 3 of 3 FirstFirst 123

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check