Used both 125 & 100 Grain Thunderheads for years on deer, elk, moose and bear...worked just fine and fly great. When I switched to carbons, I switched to wasp and then finally muzzy, now I use muzzy. I put them on the stone and have them as sharp as thunderheads in no time. Not a big deal to me as i always pratice with all my BH' s and then touch up the edges before heading out in the field. Either will work fine and are great heads.