Remington bolt spec question

[CADDIE5]

What is the correct firing spring poundage for blueprinted Remington 700 small action with 308 boltface? Also what is correct firing pin protrusion? Fellow f class competitor has 0.068" firing pin protrusion. Want to give him correct information. Thanks. Steve

 

[Bill K]

Check the F class rules and regulations and follow them.

 

[243winxb]

http://benchrest.com/showthread.php?102626-Kelbly-Actions-What-not-to-do-to-improve-accuracy 22 – 24 pound spring

and http://benchrest.com/showthread.php?92669-Remington-700-question-on-firing-pin-intermittent-misfire
Firing pin protrusion should be .030"-.039" on the small rifle primer, .060"-.068" on large rifle primer.

I have no idea. Google does.

 

[timeout]

Firing pin protrusion should be .030"-.039" on the small rifle primer, .060"-.068" on large rifle primer.

Maybe I learned something new today? I never heard of a different firing pin protrusion for small versus large rifle primers. What say the gunsmiths on here?

 

[243winxb]

060"-.068

I think a bit to much?

What say the gunsmiths on here?

Yes, i want to know too.

 

[NC/Br Shooter]

But the stock firing pin .308 bf will fire small and large primers. So?

 

[243winxb]

This asks the question also. https://forum.accurateshooter.com/threads/firing-pin.2798511/

There is a minimum amount of indent in a primer to set it off, i have it some where. Velocity may be more important.

Take Indent depth from firing pin. Add to the depth cartridge head clearence of .015" maximum, may give a clue to the needed firing pin protrusion?
From here.

 

[timeout]

This asks the question also. https://forum.accurateshooter.com/threads/firing-pin.2798511/

The is a minimum amount of indent in a primer to set it off, i have it some where. Velocity may be more important.

I did a search and read that also. I think post #9 in that thread is the most telling. My question however is still does anyone actually spec their firing pin protrusion differently for small primers versus large primers? Also, you have the issue of different firing pin diameters. I'm a proponent for the smaller .062" pin diameter. As to pin protrusion, I think about .055" would be good. I need to look in my Rifle Accuracy book by Tony Boyer and see what that says.
EDIT: Tony recommends .050" - .060"

 

[BoydAllen]

What is the correct firing spring poundage for blueprinted Remington 700 small action with 308 boltface? Also what is correct firing pin protrusion? Fellow f class competitor has 0.068" firing pin protrusion. Want to give him correct information. Thanks. Steve

24#, .055 +- .005

 

[ebb]

I have never had a problem with one that is too long, or maybe never knew if any were too long. However a short protrusion will not reliably set off primers. I had a gunsmith build a rifle that had a stock Remington bolt replaced with a PGT and the gunsmith used the guts out of the Remington bolt and never checked the pin depth. It would shot perfect for 2 or 3 shots then it would be all over the paper, I fooled with it for over a year. One day at Manatee i decided to not look down the scope and watch what was happening. First shot looked good the second I could actually see the firing pin fall and stop before the gun went off. After Gretan fixed the bolt, I bore scoped it and saw that it has fire cracking 8 inches down the barrel. I did a search on hang fire and found that they produce way more pressure than a normal shot. My brand new Broughton barrel was toast. A different smith chambered 2 Bartleins and it shoots good now, and there is a brand new Bartlein waiting in the safe.

 

[Rat Rifle]

About how many rounds did it take for this toasting to occur.

Thanks … RR

 

[BoydAllen]

FYI, this may have changed for some newer models but with that exception, Savage firing pins are adjustable for protrusion. Years back I had this discussion with Bob Greenleaf, who retired after a 25 year career with Savage as an engineer. He told me that he set his personal rifles for .035 which I took note of but did not implement, given that I did not seem to have any ignition problems. On the discussion of primer dents, for those that are unaware, it is the primer that stops the firing pin when actually firing, not the shoulder on the pin, which is the case for dry firing. If you have excess protrusion the actual effective FP fall is reduced as well as the energy.