RE: Cut on Contact?
"Easton 2215s GGII with Old Satellite Titans, whichare pretty heavy. (I want to say 150-175 gr.?) All-in-All, pretty heavy set-up which equals SLOW. This is all from memory....Plenty ofKE for it's day."
I have read quite a few posts about bow and arrow performance, virtually all of which reference Kinetic Energy and the criteria for judgement. Certainly that is an important consideration. However, when discussing penetration, as in this post, kinetic enerty is not the appropriate criteria for consideration - momentum is! To use an anology, suppose you are sitting at an intersection in your truck, when you are hit, head on, by a Volkswagen traveling at 75 mph. Certainly a bad deal, however consider you are at the same intersection in the same truck and are involved in, yet another, accident. Only this time you are hit head on by a train traveling at the same 75 mph. You have a chance of survival in the wreck with the VW, on the other hand, the wreck with the train and - hello St. Peter. The difference in the argument is the momentum of the two objects. One take home argument in that analogy for the bowhunter is that there is a price to pay in trading mass for speed. The reason you had good luck with your old set-up is the great momentunof your projectile.All that said (yes it is a mouthful),don't just get an 85 grain broadhead simply because they go faster without being aware of the fact that in so doing one pays the price of loss of momentum.Momentum= penetration. Penetration= dead critter!!