Fire pin problems

[MagnumManiac]

It's shinny right behind the point of the pin just 1 spot that why I said it looks like the pin dragging or bent just 1 spot View attachment 695886

This is not uncommon on production rifles.
If you had the tools, you could remove the firing pin from the cocking piece and rotate it 180° and put it back together.
Have you checked that no part of the bolt handle, trigger block or any screws are touching ANYWHERE they shouldn't?
This is also all to common on production rifles.
Check that the most front base screw is not bottoming out and hitting the barrel tenon. Actually, check all screws, including action bolts for length.

Cheers.

 

[hunterjohn]

It 1 in 10 twist put 3 different scopes miles town your right that rub mark is at 3 o'clock how u know

 

[hunterjohn]

It 1 in 10 twist put 3 different scopes miles town your right that rub mark is at 3 o'clock how u know

The only reason I'm looking at the fire pin is it's the only thing showing in even wear

 

[milestown]

John
I have a Classic Model 70 LH.
The bolt shroud fit to the bolt is VERY sloppy. My bolt shroud thread fit is about 30-35 thousands under sized.
When the bolt is in the closed position. The indexing tab that keeps the shroud timed pushes the shroud side ways and put a hard drag on the rear of the firing pin as it slides through the shroud.
Some gunsmiths fit a collar to the back of the threads on the shroud.
After the collar is fit it is turned to just fit inside the back of the bolt.

Hal

 

[hunterjohn]

John
I have a Classic Model 70 LH.
The bolt shroud fit to the bolt is VERY sloppy. My bolt shroud thread fit is about 30-35 thousands under sized.
When the bolt is in the closed position. The indexing tab that keeps the shroud timed pushes the shroud side ways and put a hard drag on the rear of the firing pin as it slides through the shroud.
Some gunsmiths fit a collar to the back of the threads on the shroud.
After the collar is fit it is turned to just fit inside the back of the bolt.

Hal

Did mess with the accuracy

 

[hunterjohn]

Did it mess with the accuracy

 

[milestown]

John
Still a work in progress.
GOOD Ignition is VERY important.
Hal

 

[LoneTraveler]

Have you shot the gun through a chronograph?
Firing pin problems and spring troubles will show up with big velocity changes, From round to round.
From the shiny mark on the firing pin point and on the shoulder of the full diameter part of pin. When in firing position, (Bolt closed). Look for something on back of bolt, The spring, Or something in the firing pin hole, Cocking the firing pin in the bolt. Could be just a burr in the firing pin channel could be the problem.
Goo Luck finding the problem.

 

[hunterjohn]

W

Have you shot the gun through a chronograph?
Firing pin problems and spring troubles will show up with big velocity changes, From round to round.
From the shiny mark on the firing pin point and on the shoulder of the full diameter part of pin. When in firing position, (Bolt closed). Look for something on back of bolt, The spring, Or something in the firing pin hole, Cocking the firing pin in the bolt. Could be just a burr in the firing pin channel could be the problem.
Goo Luck finding th

 

[hunterjohn]

What considered big velocity the load I shot came up 78 fps different for 9 shots now factory cam up 44 for 9 shots

 

[BillLarson]

What kinda primers you using...???

 

[spladi]

257 Roberts won't shoot got it bedded did help barrel looks decent had a miss fire so I pulled the fire pin had drag marks on 1 side of fire pin could that be the problem model 70 Winchester

I don't think the wear marks are a problem. Check for a unsuspected brass cap on the tip of the firing pin caused by a pierced primer. otherwise maybe a cleaning or a load issue is your problem. 3/4 MOA at 100 should be a goal achieved.

 

[hunterjohn]

I don't think the wear marks are a problem. Check for a unsuspected brass cap on the tip of the firing pin caused by a pierced primer. otherwise maybe a cleaning or a load issue is your problem. 3/4 MOA at 100 should be a goal achieved.

I'm telling u I shot all kinds of powder 4 different bullets and none shot good I was using 9 1/2 Remington primers

 

[spladi]

Kind of an obsolete chambering.....maybe shoots the popular powder of its day (4350 ?) One MOA at an earlier time was considered really good. Everything today is very demanding because of Guy's like us who eek out small groups and high speed, not really the same for the majority of folks in days gone by therefore precision was not as great a demand then (.257 era). Likely settling for 1.5 / 1 .750 " groups could be all the gun will do , more than this is a lemon I'd say.
Accuracy loads from my old Lyman Manuel are. 75,grn. 40 grn.4064...87 grn. 40.5 4064 100 grn.37 grn. 4064 117 grn. 35.8 grn. 4064