i have never yet been to Africa , but i know plenty about a 257 Weatherby mag. mine are 1-10- twist that i have used , my reloads with a 100 gr. bullets shoot 3700-3800 fps. i like 2 brands of bullets the best 100gr. Nosler Partitions and 100 gr. Swift A-Frames both shoot excellent on animals . i have never got Barnes bullets to shoot as consistent on paper in my custom barrels as Nosler or Swift shoot . i also have just built a new 257 Weatherby mag. with a 1 - 7 1/2 twist that i have not started shooting yet with bigger gr. bullets in the 130 gr. class. good luck ,Pete53
Last edited by pete53; 03/07/22.
