I used a 154 gr Hornady interlockSP out of my 7mm rem mag (not Btsp-flat based bullet) on a calf moose this fall and it performed just fine. Now granted a calf isn't a huge bull though. I have in the past used bullets that aren't traditionally meant for the likes of moose and done just fine....BUT I agree with oldelkhunter as reccomending a Winchester failsafe, Federal: Nosler Parts or Trophy bonded or Speers Grand slam bullet for off the shelf ammo for Moose Hunting. While they are realitively easy to tip over, they still have a heavy(thick) hide and some solid bones, as such these bullets will work nicely on da moose!