So I have a new Foxtrot Mike AR 9 build that I shot today. I am seeing about 10% punctured primers (10 out of 100). You can see in the pic below 4 punctured primers. I don't know if its a bad firing pin, or a damaged firing pin.
It ran very well, with the exception of a failure to feed a single hollow point (about 25 hollow points in the batch). Otherwise, I was seeing rounds ejecting a about 4 O'clock and the last round bolt hold open worked every time.
I looked at the firing pin and it feels like it has a rough spot. I looked at it through a magnifying glass and it looks like there is a slice across near the tip; it's hard to describe.
So I don't know if I got a bad firing pin, or if a good firing pin was damaged. It seemed to puncture primers immediately as if the firing already had issues. I did not think until after the fact to check the firing pin.
Note there were three different lots of ammo; 50 rounds of Remington UMC 115 grain FMJ; and then some hollow point and hand loads I did 30 plus years ago with Geco brass. The later two fewer punctures, but still had some.
So just the firing pin or something more?
I am running a 308 spring and 6.5 ounce 9mm buffer (long buffer).
It ran very well, with the exception of a failure to feed a single hollow point (about 25 hollow points in the batch). Otherwise, I was seeing rounds ejecting a about 4 O'clock and the last round bolt hold open worked every time.
I looked at the firing pin and it feels like it has a rough spot. I looked at it through a magnifying glass and it looks like there is a slice across near the tip; it's hard to describe.
So I don't know if I got a bad firing pin, or if a good firing pin was damaged. It seemed to puncture primers immediately as if the firing already had issues. I did not think until after the fact to check the firing pin.
Note there were three different lots of ammo; 50 rounds of Remington UMC 115 grain FMJ; and then some hollow point and hand loads I did 30 plus years ago with Geco brass. The later two fewer punctures, but still had some.
So just the firing pin or something more?
I am running a 308 spring and 6.5 ounce 9mm buffer (long buffer).
