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.
 
I too am looking for load info. I have some barnes 100gr ttsx am am going to try the H1000. what has been a good weight with this combo? I have shot the factory ammo with 100gr tsx and really like that, Last elk I shot was a 340" bull @ 534 yards and he dropped like crazy.
 
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