I would go with fixed blades if you are hunting in the woods. I shoot Muzzy 100 gr. four blade broadheads, and havn't had a problem with them. They shoot exactly like my field points with no noticeable difference. I am grouping just like you are with my field points, and broadheads. The only problem is that when you group that tight with broadheads you start cutting up you other shafts. Fixed blades are also a lot more reliable than mechanicals.