model 12 bolt face change

[bearbar]

I have several model 12 Savage bench rest rifles I just had the chance to buy a 25-300 WSM barrel and all the reloading accessories for a real good price.
Here is my question I have an extra bolt that has the small bolt face and I got the parts to convert it to a magnum bolt face but it is .1220 longer that the other bolt faces. Is it OK to just not thread the barrel in as far or did I get the wrong bolt face/ It is a short action.

[Robinhood]

#1 You must achieve headspace.
#2 Your firing pin is too short for the longer bolthead
#3 you either need a magnum firing pin or
you will need to order a SA WSM bolthead that has 7/16 long lugs

[bearbar]

Thanks for the reply
I have changed many barrels and know about headspacing.
I did change the length of the firing pin and set that to .035".
My question is did I get the wrong bolt face I ordered a short action mag bolt face from Midway.
the one I got measures .5580" and the other ones I have measure .4360".
Question is would it be safe to set the headspace on the longer bolt face doing that would put the barrel out .1220"

[Robinhood]

Absolutely you can back the barrel out the 1/8".
Did you change the firing pin or did you adjust the stop in the old firing pin to set the correct protrusion?

[bearbar]

Thanks Robinhood for the info I adjusted the original firing pin to a .035 protrusion.
It is hard trying to see which bolt face is correct maybe someone on this forum might have a complete magnum bolt that they might want to sell
I would rather have complete bolts than having to change bolt faces
I have the following barrels for my 3 Savage model 12 BR rifles
204 Ruger
22BR
6mm BR
30 BR
223
25-300WSM just got this one
6mm Dasher
I have other custom BR rifles but for the money Savage does a great job at accuracy.

[Robinhood]

I would not be surprised that the additional 1/8" compression of your firing pin spring make the bolt lift much harder.