Bushing a firing pin

[Hengehold]

I am experiencing primer flow and pierced primers on a Rem700 footprint custom action with a .068 pin diameter. The manufacturer checked the bolt this week and everything is in spec. Firing pin diameter, firing pin hole diameter, firing pin protrusion, firing pin shape, etc.


I am think would be nice to have the pin diameter reduced for peace of mind. I called Gretan And they are not interested in taking this work.


1. Is there any reason why I should not reduce the firing pin diameter? Any disadvantages to doing this?

2. Any recommendations for a machinist that is qualified to do this?

-Trevor

 

[madmixerman]

@carlsbad

 

[SSeal]

Reducing the pin and hole diameter can't hurt anything and should help.
I guess I just wonder why you would have problems with a good fitting.068 pin.

 

[spaniel]

Sent it to Longrifles Inc. Fast turn-around and great quality. I had mine done because my 223AI kept piercing primers when it shouldn't. They did a great job on it and no more pierced primers.

 

[medicineman]

Could be a weak firing pin spring.

 

[nmkid]

Carlsbad (forum member) will take care of you in a prompt manner.

 

[WesG260]

Sometimes it isn't just the pin diameter, it's the clearance in the bolt that it can extrude into.

I think pretty much every 700 I rebarelled got bushed and the pin ground to ???

Likely a couple M-70's as well.

And then there's my Ruger M-77 ... a novel required to tell that story...

 

[Hengehold]

Reducing the pin and hole diameter can't hurt anything and should help.
I guess I just wonder why you would have problems with a good fitting.068 pin.

I have the same questions that you do.

Unfortunately, I am experiencing the symptoms that I mentioned in the OP with loads that should not be over pressure. So…bushing the pin can’t hurt, and might help

 

[DaveTooley]

Tip shape?
Any marks on the head of the case indicating high pressure?

 

[6.5 forever]

@carlsbad

This

 

[Canuckienns]

lONGRIFLES quick turnaround. They did one for me

 

[KMW 1954]

What happened to Desh? I know he had some heath issues. did he close up?

 

[Hengehold]

Tip shape?
Any marks on the head of the case indicating high pressure?

Manufacturer examined the bolt and confirmed pin tip is appropriate.
No other pressure signs are present such as ejector smear, loose primer pockets, or sticky bolt lift.

 

[Tommie]

What happened to Desh? I know he had some heath issues. did he close up?

My buddy sent a bolt to him. After a while the bolt was returned without being worked on. I suspect Grimstod is concentrating on fighting the badness.

 

[wedgy]

@boltfluter

Home

 

[KMW 1954]

My buddy sent a bolt to him. After a while the bolt was returned without being worked on. I suspect Grimstod is concentrating on fighting the badness.

Thanks for that feedback!

 

[DaveTooley]

Manufacturer examined the bolt and confirmed pin tip is appropriate.
No other pressure signs are present such as ejector smear, loose primer pockets, or sticky bolt lift.

A .068" pin should not cause problems. Just saying.

 

[Webster]

I am experiencing primer flow and pierced primers on a Rem700 footprint custom action with a .068 pin diameter. The manufacturer checked the bolt this week and everything is in spec. Firing pin diameter, firing pin hole diameter, firing pin protrusion, firing pin shape, etc.


I am think would be nice to have the pin diameter reduced for peace of mind. I called Gretan And they are not interested in taking this work.


1. Is there any reason why I should not reduce the firing pin diameter? Any disadvantages to doing this?

2. Any recommendations for a machinist that is qualified to do this?

-Trevor

You have to be shooting very hot loads. Backoff. Do you have bump gauge? Been shooting a Rem 700 since 1969. Never had a loose or pierced primer. For some strange reason the signs of pressure are not the same for every rifle.

 

[mike mccormick]

You don't happen to be using federal primers, are you? I have a batch of them with very weak cups.

 

[Rat Rifle]

Your pin is .068”
What size is the hole ?