I probably wacked 30-35 deer with Muzzy's since I took my first one in 1993. Never ever had one fail, bend or break. Maybe 2 bent blades after the arrow lodged in the shoulder joint next the the heart, but that's it. I only switced to Slick Tricks because they they fly more consistently for me. The last couple years, the Muzzys have been very inconsistent out to 40 yds. I don't shoot at deer that far, but I practice that farconstantly. The ST's are right there with field points. In fact, don't plan on shooting "broadhead groups" with them. Shoot them at separate dots, or you'll ruin stuff.