I have had excellent results with 125 gr. Montec broadheads. Don't get me wrong, there are excellent mechanicals out there, but I prefer simple as long as it works. And these have done great on white tails and feral hogs. As far as "killing", I can say the same for Muzzy and Thunderhead replaceable blade design. The Montec grouped so well out of my set-up, and am very pleased with them as far as clean kills, mostly pass throughs and almost always very good blood trails.