Fire pin problems

[hunterjohn]

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

 

[Namuh]

Did it misfire once or is it continuously misfiring? If the firing pin is dragging it will definitely make the guns lock time erratic which may make you less accurate.

 

[hunterjohn]

Just once probably got around 200 rounds fried all different bullets trying to find a load some of the primers look like there off center

 

[Bobby Bailey]

Just once probably got around 200 rounds fried all different bullets trying to find a load some of the primers look like there off center

It's not uncommon for firing pins to strike slightly off center, though too far off center will cause misfires.
Over the years, I've had to bush the firing pin hole in the bolt to correct it in a couple of rifles.
In a few more, I've had to straighten the firing pins, or replace them.
With out seeing your rifle, I don't know if this is your problem.

 

[lancetkenyon]

What primer? I had a couple batches of primers over the years that were problematic.
Some CCI BR2s, and some Rem 9 1/2M.

 

[hunterjohn]

Whatever the factory horandy super performance 257 117 gr sst use

 

[436]

Just a thought:

Overview of Bushings for Bolt Firing Pins

Bushing a bolt firing pin is a common solution for issues like primer cratering and misalignment. This process involves reducing the diameter of the firing pin hole to improve the fit and function of the firing pin.

Reasons for Bushing

Common Issues

• Primer Cratering: Caused by excessive clearance between the firing pin and the bolt face.
• Misalignment: Off-center strikes on the primer can lead to inconsistent ignition.

Bushing Process

Steps Involved

1. Drilling: The existing firing pin hole is enlarged.
2. Inserting a Bushing: A smaller bushing is installed to fit the new firing pin.
3. Turning the Firing Pin: The firing pin is often turned down to a smaller diameter (e.g., from .075" to .0625") to reduce the impact area on the primer.

Tools and Techniques

• Machining Equipment: CNC machines and precision lathes are typically used for accuracy.
• Materials: High-strength alloy screws or heat-treated inserts are commonly used for durability.

Cost and Services

Pricing

• Typical Costs: Bushing services can range from $135 to $175, depending on the service provider and specific requirements.
• Turnaround Time: Expect wait times from a few weeks to several months, depending on the shop's workload.

Recommended Services

• Local Gunsmiths: Many gunsmiths offer bushing services, and it's advisable to choose one with experience in this specific area.
• Specialized Shops: Some shops focus exclusively on bolt modifications and may provide faster service.

Bushing a firing pin can significantly enhance the reliability and performance of your firearm, especially if you're experiencing issues with primer strikes.

Cheers

 

[hunterjohn]

Yea I wish I knew if this was the problem already bedded it that didn't help scope the barrel it looks decent there's a little drag on the pin but it doesn't look to bad would I be about as far ahead getting a new pin and spring

 

[MagnumManiac]

2 things require attention.
Off centre dimples in a primer does not mean the firing pin or hole is off centre, the dimple as you see it after firing is the result of the primer being forced into the protruding firing pin nose, the entire bolt could be moving.
The marks suggest to me that the firing pin may be bent, or the pin to shroud fit is not centred.
What does the firing pin spring look like? Any shiny wear marks on it anywhere?
Any shiny marks on the fattest part of the firing pin just in front of the spring boss?

All of these things could be the cause, but off centre dimples is often not an issue.

Cheers.

 

[hunterjohn]

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

 

[hunterjohn]

None just what u see in the picture

 

[slingshot33]

If it was my gun I would replace everything I don't feel safe with.

 

[hunterjohn]

Well I don't think it's safe issue maybe I'm cheap but don't want around 150 bucks and the still won't shoot good just trying to figure out where the problem is

 

[hunterjohn]

I think everything safe the gun just doesn't seem to shoot and just hate putting money in things I'm not sure will fix the problem