here in Idaho mechs are illegal and i wouldnt use them anyway, i suggest a fixed broadhead, ive used muzzy and my dad has used muzzy for quite some tome (100 grain) hes brought down 6 pt bulls 6 years in a row, and each bull didnt go but 20-30 yards at the most (robinhood36 is my dad) ive had success with muzzys as well, i shot my spike wiht one and he went about 24 yards, i would also look into 2 blade cut on impacts, such as modocks, or the 3 blade montec. anything fixed or cut on impact is the way to go, muzzys arent quite cut on impact but we have had a lot of success with them