Herb,
I must agree with you, for hunting in my humble opinion, there is no better hunting shaft.
Pdk25, I think your forgetting another thing that prevented deeper penatration in your test. The finish on the Grizzly Stick gets hot, and becomes tacky, thus creating more friction in that medium. You don't have that problem on flesh and blood. You are correct about the arrow being wider at the front being a factor.
It is a fact that tuning has been a very pleasant task with Grizzly Sticks.