PTG Oversized Bolt Problem

[Rustystud]

Always measure twice and cut once. Always modify the least expensive part first. If you don't know what you are doing get someone who does.
Bad advice is just that, bad advice.
Rustystud

[LWolken]

Let me see if I can describe this properly. The material which makes up the Bolt face and firing pin hole taper in the back of the bolt body was too long. We ended up maching the shoulder of the firing pin where the taper meets the shoulder which would allow the pin to protrude further through the PTG Bolt. I tried seevral firing pins and swapped the current one into another remington 700 and its perfect. Does PTG do this so that we must make a bolt face cut? Does the PTG bolt face need truing? I don't understand why PTG would make it this way unless it was a mistake. What is the factory spec for firing pin protrusion on a remmy 700? My others measured around 50-55 thou? Surely .035" is not enough? Gun shoots great! Still not sure why we had to do this? Maybe someone can explain?

Lance

[PEI Rob]

You really should be asking PTG. Dave will explain it to you and put your mind to ease.

[Dan Carey]

Sorry about the bum information. Custom bolt makers usually set them to .045" most of the major rifle manufacturers use .050-.055".

[J E Custom]

Originally Posted by LWolken

Let me see if I can describe this properly. The material which makes up the Bolt face and firing pin hole taper in the back of the bolt body was too long. We ended up maching the shoulder of the firing pin where the taper meets the shoulder which would allow the pin to protrude further through the PTG Bolt. I tried seevral firing pins and swapped the current one into another remington 700 and its perfect. Does PTG do this so that we must make a bolt face cut? Does the PTG bolt face need truing? I don't understand why PTG would make it this way unless it was a mistake. What is the factory spec for firing pin protrusion on a remmy 700? My others measured around 50-55 thou? Surely .035" is not enough? Gun shoots great! Still not sure why we had to do this? Maybe someone can explain?

Lance

Lance

I'm glad you worked out your problem and it was simple.

I liked your method of testing other firing pins, that eliminated the possibility of
it being the firing pin.

I dont think PTG did anything but make a mistake (we are all human) on this bolt
or it got through inspection without being caught.

I had hoped that this was the problem because it would be easy to find and fix.

The main thing is that you are shooting and having fun.

J E CUSTOM

[PEI Rob]

I certainly do not know how this bolt was made and also don't know how it was intended to be made. However, if you measure primer strikes for BR actions, you will most likely find none past .025" depth. Its entirely possible it was made that way. Again I do not know but for a BR bolt, trued action and handloads, .035" protrusion is fine and that is usually when a PTG bolt would be used. The dents in my 6mm Dasher Savage are .020", and the PGW Timberwolff fired .338 Lapua dents measure .022". I never measured my lapua dents but the protrusion is between .035" and .040" FWIW.

Cheers