I've been loading the Weatherby calibers for a few years and would like to get away from the RL 22 and 25 powders due to temp. sensitivity. Can anyone help me with other good load information for these two calibers?
I've had great success with IMR7828 and IMR4831 in both my .257's. One is a Mark V and the other is a Remington CDL. I've been convinced to try H4831 which I'll be using this weekend. I understand Hodgen powders have a wide temp range and I can get it! I use Nosler 100 grain Ballistic tips as well as Barnes TTSX in the same weight. Hope that helps.
I also really like the 110 Accubonds with 72.0gr H1000 in my 257WBY. I just tried the load last week, and shot a very impressive group with it. With the OAL at 3.30" it shot a .787" group, and moving the bullet out to 3.40" it shot a .240" @ 100yds. (that was from subtracting the caliber size from the group) I am very impressed with this Rem CDL now that I found something it likes.
Another good load for mine is 117 SST, 68.0 gr RL25. This load shot a .762" group at OAL 3.235" Both of these loads should be fine hunting loads.