I know you feel the four you mentioned have it covered ,but think about WIN. 180 gr FAIL SAFE. Trust me!!!!! you can' t go wrong on this slug. I loaded it up for elk,but will be using the exact same load for grizz when the time comes.[soon I hope]. silvertip is a great round for bear! Shot a mulie with one a few years ago.Nice little entry hole,but NO SHOULDER LEFT ON THE OTHER SIDE!!!Like I said silvertip is for bear or dangerous game.It does max. tissue dammage RIGHT NOW!! one word-FAILSAFE. THEY ARE GREAT!!and very flat shooting