In reloading the first batch of fired cases, I notice that the shoulder is behind where the shoulder is formed with the RCBS full length resizing die. So in effect I am only neck sizing the cases. And this is after setting the barrel back .050 to correct the headspace. From what I have read, there are no hard and fast dimensions for the 50-95 wcf chamber but Chapperal must have just picked some numbers out of the air.
However, case expansion is minimal and I don't anticipate any serious problems. It seems to work well in arctic conditions but I hope spring gets here soon. -------------------------------- GeezerD