Gunsmithing First time Rebarreling a CRF Win70 - Help?

[mram10]

I have a crf win 70 long action in 300wm. I have a 26"shilen on there, but the head space allows closing on a no-go gauge. I want to take the barrel, machine it for a full turn and rechamber. If my math is correct, I need to take off about .0416 from the barrel to make it go in one full turn. Does this sound right?

Also, if it were your rifle what would you do to it? how many turns to turn it down to a 300wsm? Thanks guys. Merry Christmas.

 

[mram10]

Re: First time Rebarreling a CRF Win70 - Help?

Anyone?

 

[300sniper]

Re: First time Rebarreling a CRF Win70 - Help?

i haven't worked with winchesters but is the barrel tennon really 24 tpi?

 

[Jkob]

Re: First time Rebarreling a CRF Win70 - Help?

That barrel should have a 1"-16TPI tenon; one turn would take .0625" from all the surfaces on the back side.

 

[Mark Housel]

Re: First time Rebarreling a CRF Win70 - Help?


IIRC Winchester is 1 x 16 TPI (.0625 for 1 full turn)

Ooops, ya beat me to it. Didn't refresh before I posted.

 

[mram10]

Re: First time Rebarreling a CRF Win70 - Help?

Great! Thank you guys.

Would it be worth taking enough off to chamber it in 300wsm or just leave it a 300wm?

 

[Jim See]

Re: First time Rebarreling a CRF Win70 - Help?

If your going to make it a 300 wsm then take off the entire thread tennon and rethread chamber, that will clean up the old 300wm chamber. Only if you have enough straight shank to do that. I would get a new barrel before doing that to a factory though.

 

[mram10]

Re: First time Rebarreling a CRF Win70 - Help?

Thanks Jim. It is a 26" shilen, but I am not sure if I would have enough to cut it all off and start from scratch.