CALLING ON PRE 64 OWNERS. I have a pre 64 model 70 .220 Swift w/ factory varmint barrel. Handed down from my grandfather, and have never shot it. I started with fresh brass, shot some ladders for load dev and am going back to load at my node. Some of these fresh casings chambered really tightly. I measured the shoulder on my fire formed cases and they measure .007-.010 shorter than any other 220 swift I have loaded for before. I have to bottom out my full length sizer to the point that it is seriously over camming the press to get a .001-.002 shoulder bump from the fired formed cases. I actually can’t even get them far enough back on most cases. So, I called my cousin who shot this rifle in the past, and he recalled even factory ammo chambering with a hard bolt close.
So QUESTION: Has anyone on here ever heard of pre 64s having a short chamber? Possibly inconsistencies in Winchester chamber reamers in the early 60s? This rifle was manufactured 1960-1962ish. I don’t know what else it could possibly be, but I can not get my shoulders bumped back below the fire formed dimension, nor far enough back to chamber with a smooth bolt close.
I am considering getting it rebarreled just to start fresh and rule that out, but don’t really want to mess with a factory rifle that is fairly rare if I don’t have to. Any comments or help would be appreciated.
So QUESTION: Has anyone on here ever heard of pre 64s having a short chamber? Possibly inconsistencies in Winchester chamber reamers in the early 60s? This rifle was manufactured 1960-1962ish. I don’t know what else it could possibly be, but I can not get my shoulders bumped back below the fire formed dimension, nor far enough back to chamber with a smooth bolt close.
I am considering getting it rebarreled just to start fresh and rule that out, but don’t really want to mess with a factory rifle that is fairly rare if I don’t have to. Any comments or help would be appreciated.
