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[ARCHIVED THREAD] - Breech face erosion

Posted: 12/2/2012 6:39:35 PM EDT

Is the circle of what looks to be erosion around the firing pin normal? It has me somewhat concerned.

Thanks!

Posted: 12/2/2012 6:45:33 PM EDT

[#1]

Looks like a hardened insert.........................

Older slide?

If it's a newer slide without one, that is nothing to worry about.

Posted: 12/2/2012 7:08:53 PM EDT

[#2]

Colt MKIV Series 80 with collet bushing, so the youngest it could be is 88-89'.

Posted: 12/2/2012 7:59:58 PM EDT

[#3]

Might it have an offset firing pin opening bushing installed to correct off-center firing pin strikes?

Posted: 12/2/2012 8:09:07 PM EDT

[#4]

Quoted:
Might it have an offset firing pin opening bushing installed to correct off-center firing pin strikes?

Would that be in the firing pin channel? I didn't see one in there when I had the firing pin out.

Posted: 12/3/2012 4:39:22 AM EDT

[#5]

the Clark offset firing pin bushings were machined into a blind hole from the breech face... you may see a parting line in the firing pin hole, possibly not...if the bushing was frozen first, they make a pretty tight fit...

my 1911s that saw a lot of USPSA use (>50,000 rounds) show similar bolt face indentations and marks... no bushings, just pressure and occasional gas cutting from primer blow by

Posted: 12/3/2012 10:27:57 PM EDT

[#6]

It looks like where gas has been escaping from around the primer when firing. I personally wouldn't worry about it.

[ARCHIVED THREAD] - Breech face erosion

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[ARCHIVED THREAD] - Breech face erosion

[ARCHIVED THREAD] - Breech face erosion