Remington 760 Gamemaster primer dimpling

7

760gamemaster308

New member
When loading and unloading the same cartridge multiple times, a dimple from the firing pin appears on the primer. It is an early 1970’s Gamemaster in .308. Brand of ammo doesn’t matter. Any thoughts on safety or fixes? Clearly it is unnerving to know the primer is being struck when closing the slide. It has never discharged while loading.
 
FWIW, my family and almost everybody (almost - LOL) in PA has shot the PA Machinegun for decades since they came out in the 50's with no AD's (assuming relatively sane gun handling skills). I've seen what you're talking about, but never seen an issue with it. I'm guessing here they may have a free-floating firing pin that may create an issue? Not sure on that right now, just a theory. The way most of us hunt with pump guns on PA, we load them from the mag, and rotate the last one we ejected from the chamber again (after lunch/the last drive/yesterday/etc.). Beings that we prob dont shoot a given piece of ammo until we run it thru the chamber several times, and we keep rotating those top 2 pcs. several times, many times, the "dimple" MAY become quite evident. I'm curious to see what other comments there may be on this.

Where in PA are you? I'm about an hour north of Harrisburg along the Susquehanna.

And welcome to the site!
 
Sounds like your firing pin spring (only on later models of the 760) is broken or perhaps firing pin sticking forward for whatever reason (broken FP or buildup of grease/crud in bolt) causing it to be stuck in forward position when you slam bolt forward. Apparently early models did not have a return spring on FP and relied on being free floating?? 760 Remington bolt disassembly

Dimpling of primers can cause slam fire if FP is protruding and bolt slams shut forcefully.

Regards,
hm
 
Near Hamburg…. Thanks for sharing your thoughts. My last shell probably was loaded and unloaded 8-10 times and has a significant dimple. I will fire it off at the range and start on a fresh one for next season.
 
Just so you clearly understand, it is not normal or safe what you are seeing/occurring with your firearm. An unexpected discharge is what happens when the firing pin makes contact with the primer when the bolt is closing.
 
Originally Posted By: spotstalkshootJust so you clearly understand, it is not normal or safe what you are seeing/occurring with your firearm. An unexpected discharge is what happens when the firing pin makes contact with the primer when the bolt is closing.

AR15 does the same thing.
 
Originally Posted By: GCOriginally Posted By: spotstalkshootJust so you clearly understand, it is not normal or safe what you are seeing/occurring with your firearm. An unexpected discharge is what happens when the firing pin makes contact with the primer when the bolt is closing.

AR15 does the same thing.

yep. just depends on how hard the firing pin hits the primer. there are sever types of rifles that will do this to a primer. not uncommon at all.
 


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