I was getting a few every 50 or so from my ar15. I looked at the firing pin and replaced it. No more piercings after 50 down the pipe. Will continue to monitor. Im thinking either the firing pin got damaged from a piece of brass sticking to the tip or some cheap factory plinkers are to blame. My load wasn't hot or anything and it was 70ish degrees outside. (Mixed headstamp, wsr primer, 55gr vmax, 25.8 gr wc748, 2.250 coal) What do you think? Ive also switched to rem 7 1/2 primers as ive read they are harder.
pierced primer
- Thread starter Okcafe86
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Jesse Heywood
Member
Can you take picture of the point of the old firing pin?
rcmodel
Member in memoriam
Once a primer pierces, the gas cutting can imperceptibly erode the polished firing pin tip.
Once that happens, it's all downhill from there.
You most likely fixed it with a new firing pin.
Where these reloads?
If so, what primers were you using?
rc
Once that happens, it's all downhill from there.
You most likely fixed it with a new firing pin.
Where these reloads?
If so, what primers were you using?
rc
Jesse Heywood
Member
Since you could see the cut, you did well to change the pin and go to a harder primer. The AR15 is notorious for piercing softer primers, that's why some makers have a line specifically for that use. I've been using Magtech SR lately with no problems.
rcmodel
Member in memoriam
Never mind!
rc
rc
ArchAngelCD
Member.
When available I use CCI#41 primers for AR ammo. Next are CCI-450 and then Rem 7 1/2. For 223 ammo shot in a bolt action rifle I usually use CCI-400 primers.
You said you went to Rem 7 1/2 primers. What were you using before that? Were the pierced primers Rem 7 1/2?
You said you went to Rem 7 1/2 primers. What were you using before that? Were the pierced primers Rem 7 1/2?
Jesse Heywood
Member
I guess you were supposed to put that in big blue letters!
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