c903,
My point was that it does not take a lot of KE to blast through deer. They just aren't big animals such as Elk or Moose. The other thing about that FAST bow (237fps) was that it would shoot bare shafts 35 yards and all that you cold see going was a nock. AND, the point being was that all the momentum was straight behind that little broadhead giving the best penetration for the setup OK, you came up with 39' pounds which got the job done, but I knew it was low enough as to not allow a best case scenerio for expandable heads. A lot of times it just comes down to common sense, if you know what I mean.