I shoot 125gr Montecs, along with the preseasons...
I shoot the preseasons leading up to bow season and my broadheads fly the exact same.
Rage mechanicals come with a practice head as well. Its no kidding though, no matter the tuning, your arrows are gonna fly differently with different heads.
Try going from a fixed blade to a mechanical sometime, or add a stopper for turkey... You'll be way off.