Help with bolt head (savage)

[pitbull]

I have a 110 heavy barrel 25-06 proably 2004ish model. I was thinking to change it to 6.5 prc. I know I have to change the bolt face but looks like there is one for small firing pin and one for large firing pin not sure how to tell what I have.

 

[Rocketvapor]

0.145" and 0.095" at the cross pin.
0.140" and 0.090" at the pin tip.
Small after 2001, but measure to be sure.
There may be some other differences if you are going from standard bolt head to a magnum bolt head.

Match up SA/LA/Magnum, lug length LA is .5", Mag is 9/16", pin diameter, firing pin length (different for magnum bolt head).