I shoot them out of my Drenalin and they fly well. I shoot 30" 340's at 10.2 gpi with 100gr Montec and 4" vanes at 70 lbs. Last deer I shot had the arrow keep going out the other side at a high rate of speed. They penetrate well and steer very little in a cross wind. My only gripe is that the can be hard to remove form a target