I have had good results (accuracy and expansion/mushrooming) with Sierra 140-150-160 Spitzer Boat Tails (SBT) in .280/.280 AI/ 7mm mag,,,,,,,,,really like the 160's for elk/caribou/bear/moose,,,,I have not hunted for them all ,,but have loaded ammo that has been used by shooting customers/friends for everything from deer to grizzly bear with good results,,,,one user complained when he shot a brown bear that was facing him at 50 yds and he shot it just below the mouth in the neck and the bullet was found in its butt cheek !!!! The bullet went thru 6 or 7 feet of the bear!!!hahah,,,and no exit wound,,,,,,prolly had 50% of its weight left,,,,Roger