I shot a moose at 547 yards with a 150ttsx from my 300wsm. MV was around 3350 and it was quartering towards me. Hit the shoulder and exited behind the ribs on the other side. It was on its feet for a minute or so but only went about 30 yards and down. It worked well and shot 1/4 moa over Superformance powder.
With the all coppers I try to limit my range to where impact velocity is over 2000 fps. I think that one was going around 2350 at impact. Looked like it expanded but it didn't look like it was extreme by any means. It penetrated through at least 4 feet of moose though.
At longer ranges when impact speeds are lower I like the amax. Although I just picked up a box of 6.5 143g eld-x and a box of 308 212g eld-x and I'm excited to see if I can get the to shoot.
