i'm doing just the reverse. I'm going from Rocket Hammerheads (100gr) to Muzzy 3s. Ive shot one deer with the Rockets, killed it quickly, but the arrow got stuck in the far shoulder at 17yds. My brother killed a doe last year with them, hit her low and the blade's "foot" deflected the arrow right along her underside, which split her wide open. It was not a fun tracking job (lots of thick stuff, sparse trail), but we found the deer within 75yds. I have other hunting partners that have had zero problems (and they kill more deer than I do), but the issues with deflection and penetration have caused me to go the fixed blade route this season. I will probably still shoot mechs, especially at turkeys, but not this season. Good luck with whatever you pick, buzzr.