I have talked with people who shoot a lot of deer every year and they were using Muzzy and have switched to Spitfires. In there words, the blood trails were dramatically better with the spitfire. The group of people I talked with have killed more then 50 deer with these broadheads. I am a die hard Muzzy and Mathews fan but after this year it is looking more like Spitfires and Bowtech for me.