Ovalled firing pin hole or?

Ruger007

Ruger007

CGN Ultra frequent flyer
Rating - 100%
127   0   0
Location
Way West


Ruger M77V. 6mm Rem

Seen 4000 rds plus. But still shoots great!
Is my first rifle.

I think the firing pin hole is worn. Just started to blank primers. I talked to a gunsmith and he says that is not the issue. He says it is headspace and can tell by just looking at the bolt.

Second opinion before I ship the whole thing off. As I don't have the guages for 6mm.
 
Headspace issues after 4k rounds, maybe?? With factory ammo or hand loads??

With factory ammo, you may have a bad lot.

If you are having headspace issues with hand loads, don't set the shoulders back and just neck size. Did something change in your loading regimen. Did the locking ring on your sizing die get unintentionally adjusted? Change shell head holder??

Your firing pin hole does have a bit of expected wear but not enough to cause FTF. Have you pulled apart the bolt??? Maybe the firing pin spring is broken???
 
By blanking primers, you mean that a disc is departing the primer, leaving a hole?

How well does the firing pin tip fit the hole? Is the firing pin tip straight? Is the mainspring still strong?
 
Hand loads. I don't think I am having head space issues. I think it is the pin hole.

Bolt has been apart. Cleaned up spring looks good.
 
tiriaq said:
By blanking primers, you mean that a disc is departing the primer, leaving a hole?

How well does the firing pin tip fit the hole? Is the firing pin tip straight? Is the mainspring still strong?
Click to expand...

Yes leaving a hole in the primer.
Pin looks normal to me. Some slop in the pin to hole.
Spring seems strong.
 
That's really ugly...

"He says it is headspace and can tell by just looking at the bolt".


Well that's BS... headspace is measured by closing the bolt on steel gauges in the chamber... commercial rifles use a go and no go gauge, the military also use a field gauge.

I would say you are blanking primers due to a poor fit on pin tip and hole with a weak firing pin spring...

... now with hand loads you may be creating excessive case head clearance which has the same effect as if the rifle has excessive headspace... but the rifle is most likely correct...
 
If you remove the striker from the bolt and have a look at the spring, you will probably notice that three or four coils at each end of the spring have collapsed. The thing is, when the first primer blanks, that lets enough gas back into the bolt that the firing pin slams back and collapses the spring further. So, the worse it gets, the worse it gets. I would replace the spring with a new factory weight spring or increase the spring rate by a couple of pounds, if it pleases you.
 
You must log in or register to reply here.
Back
Top Bottom