I've used the Magnus Stinger and Buzzcuts for many years and harvested quite a few deer with them. I liked the lifetime guarantee with them but the reason I switched is they are not as strong as the Slick Trick Viper Tricks I am now using in my lighter poundage bow. In my heavier bow I use Rage Hypodermics for deer size critters. Blood trails are excellent and death is quick. The big cut is a plus too should I ever make a less than ideal shot which is bound to happen sooner or later but which I don't ever want.