I have used the Muzzy 4 blade 100 grain head for many years with great success. Recently tuned my bow up, upgraded arrows, but stayed with the same Muzzy's. Completed a full walk back tune and they fly right with my field tips. The real advantage of the Muzzy for me was that you receive practice blades with the pack. Therefore, I practice with the heads, change the tip + hunting blades and I am good. Don't even have to unscrew the head from the arrow.