Is this a normal Primer strike?

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LeftyTSGC

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I found these two sets of brass on the range today:

Does anyone know what handgun strikes on the edge of the primer as in the picture?

Also the second set of pictures, not same brass, shows a primer strike where the primer is actually protruding where it was struck instead of a causing an indentation. Can anyone explain this, just curiious, not my handguns, but looks interesting.
 

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Probably a very dirty gun with brass fags in the slide keeping the barrel from going fully into battery.

rc
 
It would appear a barrel is not locating in the slide properly causing the off center strikes.

The other one appears to be a marginal energy striker whereby the pressure curve rise overpowers the available energy wanting to drive the striker back into its original position. It needs to have the spring replaced that supplies energy for ignition.

I got a new 7615 several years ago and it was doing the same thing. I checked the striker energy and found it lacking thus I ordered a new hammer spring from Wolff and the problem went away immediately upon replacement.
 
1911 in 9mm
my emp hits like that because the firing pin hits on center on the 40 model and off center on the 9mm model.
 
Wow, thanks for all the input. I knew there were explanations for everything. THR has a wealth of knowledge. Ill see what else i can find to ask.

Lefty
 
I'd guess someone's shooting 9mm Major loads, practicing with their USPSA Open gun. The very high pressure will cause that sort of primer "flow" around the firing pin.

(Be careful reloading them. Sometimes the primer pockets get expanded enough that your new primer will fall out.)

The off-center strikes are not a good sign. It either appears that the barrel is very poorly fit to the gun or that there's something holding up the works and the gun can't go fully back into battery but is still able to fire.
 
1911 in 9mm
my emp hits like that because the firing pin hits on center on the 40 model and off center on the 9mm model.
Interesting. My EMP's primer strikes are centered though.

the selector switch on the hammer set in 'Rimfire' position,
Sounds very feasible.

Either that or the gun is very dirty or something is wrong mechanically.
 
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