I also use NAP Razorbak's 100's. Its the first COC broadhead I ever tried. So I can't compare it to any others. I used to use NAP Thunderheads, and before that the old heavy grained razorbaks. I always liked the concept of blades free to spin on the ferrule. If your arrows have alot of spin from offset vanes. A broadhead of this type would allow the arrow to spin upon initial penetration, over stopping the spin upon immediate impact or twisting the head while entering.Anyways the new razorbaks COC worked very well for me. The first buck I took using them, it was a good vital shot. The buck only went 20yds, and dropped! I've never had a deer go only 20yds unless it was spined. Most have went in the 50yd range before piling up. So I was darn impressed with them, and see no reason to try anything else!!