I used to test broadheads and post the results on several different archery boards. This was around 8 to 10 years ago, before youtube. Even had my own website. I have learned a lot about broadheads and how they work. I switched to the NAP Killzone a few years ago and have been very pleased. This head is durable, flys well opens fast and holds up. I have used just about every head on the market over the years and these are my current favorite for deer/black bear. If I were going to hunt bigger critters I would mostly likely move up to a premium fixed blade of some type. Muzzys are never a bad choice.