I don't think so mo, these darn Snypers will open on paper, I don't think there's drag at all and to be honest, the way they work, I'd bet they take less KE than jackknife style heads. They are impressive to say the least.

I'm just wondering if it's purely coincidental. There are so many variables that hinder penetration. Take my setup I killed my bull elk with. I was shooting roughtly a 400+ grn Beman Trophy Hunter 70-90 pultruded carbon arrow with Muzzys at nearly 80ftlbs. I blew through the bull like butter at 33 yards, the arrow layed 20 yards past the bull. I came home from that trip, I used the same arrow/broadhead, changed blades and didn't pass through a buck nor a doe I shot...same exact setup....I think my deer are just tough sum beaches.