Gunsmithing Is this the effect of an over size firing pin hole

[tkemo648]

I was shooting with a friend a couple of weeks ago an noticed his gun was cratering the primers on the ammo. We were both shooting the same .270 win 130gr Federal Power-Shok ammo (13.97 at Wally World) and my rifle was not doing this cratering at all. His rifle is a newer Remington 700 SPS...I think...the replacement for the ADL model, and mine is a late 90's 700 ADL that had been restocked and a sendero barrel added. Both guns actions are bone stock with nothing altered.

All his fired cases looked like this:

All my fired cases looked like this:

Is there really that much of a difference between two guns built around 10 years apart shooting exactly the same ammo?

 

[Goin'Hot]

Re: Is this the effect of an over size firing pin hole

Yep. The firing pin needs bushed in the rifle on top. Get ahold of gretan rifles. Greg will take care of ya.

 

[DALLAS ROOTS]

Re: Is this the effect of an over size firing pin hole

That is usually caused by an oversized firing pin hole not over pressure.

So I would say yes you are right.

 

[Jim See]

Re: Is this the effect of an over size firing pin hole

and it won't hurt a thing in a 270 hunting rifle to keep shooting it just as it is.