Re: Loads for the new 257 Wby
R-25 is the only powder I have tried, as that is what came with the rifle when I bought it from my buddy. I have played with loads and seating depths a little more than he did and have settled on the loads that I listed here. I started at factory seating depths and worked out from there. My chart shows the 100gr measures 2.7520" with my comparator. The 100gr bullets have a cannulure and it is above the neck mouth, no crimp.