The 123 Amax is amazing in the 260, I use either H4831 or H4350 and they shoot great. I have only shot coyote sized critters, but the results were devastating so far! I don't check speed, but mainly just load up to what shoots best and stick with that. I like 4350 a little better because I don't like compressed loads (only personal preference) and the 4350 fills the case 90+ percent which is perfect for shot to shot consistancy. My gun also likes the 140 a-max with both of these powders. T.S.
