What needs to be fit when installing a Rem firing pin assembly in a PTG bolt?

[hoz53]

Ive got a couple LA- rem 700 PTG bolts that need firing pin assemblies. I have heard the rem assemblies need to be fit to the ptg bolts. What needs to be done? i did take a firing pin assembly from a stock rem 700 bolt and put it one of the PTG bolts and it seemed to work ok to me so i am wondering. Thanks

 

[shortgrass]

Check firing pin protrusion. Shouldn't need saying but, check headspace (with gauges) if you plan on using it in a previously barreled action.

 

[Walt Krafft]

Check pin diameter. Check cocking cam clearance.

 

[STS]

I would also check firing pin fall. Anytime any of these bolt psrts are changed, including the trigger, I check all of the things mentioned. I also check the clearance from the cocking piece travel to the bottom of the shroud.

 

[hoz53]

Check firing pin protrusion. Shouldn't need saying but, check headspace (with gauges) if you plan on using it in a previously barreled action.

these are in actions only. I will check the protrusion— thanks shortgrass

 

[hoz53]

Check pin diameter. Check cocking cam clearance.

Ok i will check the pin dia. Im not sure i know how to check cocking cam clearance but i will look at some bolts and see- thanks Walt

 

[hoz53]

I would also check firing pin fall. Anytime any of these bolt psrts are changed, including the trigger, I check all of the things mentioned. I also check the clearance from the cocking piece travel to the bottom of the shroud.

Ok i can check pin fall. clearance from cocking travel to bottom of shroud Im not so sure about but i will work on it—- Thanks STS

 

[STS]

Ok i can check pin fall. clearance from cocking travel to bottom of shroud Im not so sure about but i will work on it—- Thanks STS

That's kind of a test just to make sure all the bases are covered. I've only had one case ever that anything needed to be done with the shroud to ensure adequate clearance, and that was with a aftermarket cocking piece. Just make sure it doesn't bottom out just like you need to check the cocking cam clearance as Walt Krafft mentioned. The goal is to make sure nothing in the bolt stops the firing pin before it strikes the primer. It's pretty common to have somewhere around .017 to .020 dent depth in a dry fired primer. If you have .050 firing pin protrusion, the pin is stopped by the primer .030 before the firing pin collar stops on the bolt. All the energy is spent in the primer.

 

[hoz53]

That's kind of a test just to make sure all the bases are covered. I've only had one case ever that anything needed to be done with the shroud to ensure adequate clearance, and that was with a aftermarket cocking piece. Just make sure it doesn't bottom out just like you need to check the cocking cam clearance as Walt Krafft mentioned. The goal is to make sure nothing in the bolt stops the firing pin before it strikes the primer. It's pretty common to have somewhere .017 to .020 dent depth in a dry fired primer. If you have .050 firing pin protrusion the pin is stopped by the primer .030 before the firing pin collar stops on the bolt. All the energy is spent in the primer.

Ok Thanks Much for all that info. I appreciate it. I think i see what you mean now by the clearances. I will get to work on it.