AR Sponsor
Posted: 2/6/2008 4:58:20 AM EDT
| Note:The primers that I can find have a hole all the way through them.And I have removed the firing pin and looked under magnification to see any burrs or distortions and"NOTHING".I exchanged the firing pin with one from another AR and still the same problem.Thanks for the reply...Zhukov |
Pierced primers is a sign of overpressure. Blowing primers is a sign of overpressure. Federal brass is soft, and on a high pressure load, it would not suprise me to see primers falling out. Overpressure can be caused by the ammo, or the chamber. On the Varminter - that should have a hybrid SAAMI chamber... which should be fine for any .223 ammo, and likely even shoot 5.56 pressure ammo. First - I might consider checking headspace just to make sure Bushy didnt screw up. Have you fired other ammo in this same weapon? Have you fired the same lot of gold medal in other weapons? |
Yep - if all ammo shows signs of pressure - then something is wrong with the chamber. I'd call Bushmaster first, and let them make it right. |
For those who ask: "Why does the military crimp in primers?"
And, it's not limited to Federal Brand. ______________________________________________ Folks........it's NOT that your ammo is showing signs of "pressure." It's "over pressure'" that's the problem/fault. The FACT that the bullet is sent on it's way down the barrel........is a sign of "pressure." But, this "figure of speech" is a common mis-statement. Like the word: "Bullet" being used when speaking about a "cartridge." ______________________________________________ The classic/common “over pressure” signs, are the flattened primers, "blown” primers and/or sometimes pierced primers. Though, pierced primers could also point to a fault with a firing pin. As, most of us don't have a real lab with a pressure barrel.........we can only speculate that we are correct when we site, “over pressure.” Because, bad brass and the primers, could also be at fault (ie. loose, due to under sized primers and/or over sized pockets, etc., you get the picture). ______________________________________________ Aloha, Mark |
AR Sponsor