I have been having good luck with the amax's out of my 300 wsm
as far as accuracy, but out of my 26 inch barrel they just are really lacking as far as Velocity oomph. I know velocity isn't everything but the same rifle pumps 150 b-tips at 3350 for some reason and upon punching the numbers they are the better bet.
My pet load is 60.1 of Imr 4350. But I'm in the 2600 ish fps, I don't know what the actual group size was but five shot group was pretty impressive with nary a flier.
Meichele I think your on the right track smacking them out of an ultra mag at a high velocity. I would like to get a 30in barrel in 300 ultra and see how fast I can pump them. I think for blacktail and caribou they would be perfect, maybe a little light skinned for moose and elk.