I just shot 2 deer this past weekend with my new arrows and I am now gettn rid of the old(New actually) and going with my new ones. I just went to the GT Velocity XT 400's for bit of more speed, flatter trajectory, hopefully a bit more penetration. NOT!!! I lost a doe last year that should have been recovered, did not penetrate. 65# DW with 27-1/2", 345grn arrows. Just lost another one a month ago, same thing shoulder on opposite side stopped arrow, did not penetrate/exit. Just went over to FMJ 400's, 404grns, and BLEW through 2 deer this past weekend. Went completely through the scapula on both shoulders and exited JUST over the shoulder joint on opposite shoulder of a nice heavy So.Il 3-1/2yr old cullbuck and then a fat adult doe. Less then 5 minutes apart, fell within 40yds of being shot and only 60yds apart!!!!!!! Shot spots were only 10yds apart!!! I am now selling the 10 GT's for a few more FMJ's. I got caught up in the speed game and it cost me dearly!!!!