I shot 117 gr. Sierras out of my Wby Mk V .257 for years, with mixed results- after a couple of blowups on mule deer, I went to 100 gr. Barnes TSXes, and have been completely satisfied with the results. Most recently, tried the TTSXes, with identical results as far as I can tell- .5" groups and excellent results on game. Pushed at 3700 fps out of my Mk V, sight-in of 2" high at 100 puts it dead on at 300 yards. I have shot everything from coyotes to elk with the 100 gr. Barnes bullets, and see no reason to ever change.
