Hi, physics don't lie. True. But that doesn't mean people can't draw wrong conclusions.If you like physics, check out 5 shots tests. You will find that no head that cuts as much as a Trick outpenetrates it.3/4" plywood mimics bone pretty well, and there isn't much tougher tissue than a tire. Ifyour friction theory was true,it would be provenin thoseconsistent, controlled, repeatable tests. Itisn't.See for yourself. I will tell you that aMichigan dealer told me theyare gettingpassthroughs with a big hole with Tricks through the shoulders of 500+ Russian boars. Said they couldn't believe it, but they and othershave done it. Not too shabby penetration,similar resultsto5 shots tests. But other heads kill also, different strokes for different folks,shoot whatever pleases you and I hope youget something for the skillet.