Originally Posted by moosehunter
Is it possible to rebarrel a win mod 70 in 300WM and open the bolt face and chamber to 300RUM?
Yes. The bolt face will work for both. (Rim dia. win mag =.532) and the RUM is .534.
The OD of the belt is .513 and the base of the RUM is .550 So you can re barrel or
just re chamber if you have a good barrel.
The action rails may have to be opened up a little to except the larger case of the RUM.
Also case length is .330 thousandths longer on the RUM but should work as long as you
have a magnum action. Note some of the Winchesters have a 3006 length action (Long
but not as long as a magnum action) so check to see if you will have enough length before
you break it down or re chamber it.
I hope this helps.
J E CUSTOM