Looking at your photos magnified, I see another little "divot" on each round, to the side of the main primer dimple. Wonder what's causing that? Is there something on the slide face causing that? Or is it a secondary bounce or something from the firing pin after the round fires? Would be interesting to see if that second little mark appears on one of the rounds that didn't fire with a single firing pin hit.
Also, some of the photos show the firing pin dimple pretty much in the center of the primer, on some of them there's a definite offset from center. Couple an off-center hit with a harder primer, and there might not be enough force for the primer cup to strike the internal anvil to ignite it.
Search found 2 matches
Return to “Sig...did I limp wrist it?”
- Fri Jun 02, 2017 8:34 am
- Forum: General Gun, Shooting & Equipment Discussion
- Topic: Sig...did I limp wrist it?
- Replies: 33
- Views: 7911
- Fri Jun 02, 2017 8:28 am
- Forum: General Gun, Shooting & Equipment Discussion
- Topic: Sig...did I limp wrist it?
- Replies: 33
- Views: 7911
Re: Sig...did I limp wrist it?
It will be more difficult to see if it's a hard primer/light strike after you've pulled the trigger the second time and fired the round. The real inspection would be to wait about 30 seconds after the failure to fire, eject your magazine, and carefully eject the unfired round and see what the primer strike looks like, compared to ones that have fired the first time. I'll bet you will see that the primer is dimpled less than the others.