Thanks guys! No doubt, either broadhead put in the boiler room will end up with a dead bear... Was just trying to sort out the specific nature of bears and the benefit of the 3-Blade wound channel vs. potential penetration benefits with the 2-Blade Single bevel should I encounter heavier bone... I've heard about issues with the long hair / fur impeding blood trails, and I've also heard about shoulder bones being extremely difficult to penetrate... Trying to make the best composite choice I can.
BowMike - I'm not sure how long of arrows you're shooting, but your set-up sounds weak to me :-) I've bareshaft tuned and I also use the STU Dynamic Spine Calculator with real good success across several different arrow types & configurations. I do know that things are a little trickier with the Hidden Inserts and their length. For example the 100 Grain Inserts are quite a bit longer which produces a higher dynamic spine, and of course the 100 grain weight produces a weakening effect but not to the degree that it would if the the standard 16 grain insert & 100 grain insert were the same length... My 260 Grains is further toward the tip and I have more length of flexible shaft with this set-up. Plus I have about a 15 grain aluminum footing on the tip which slightly weakens the dynamic spine. I do have a MFX Classic 400 solution right now as well that is solid. MFX Classic 400 Cut to 29" w/50Grain Insert, small aluminum footing, & 175 Grain VPA Terminators or Simmons Tiger Sharks...
Thanks again guys, keep the advice coming I'm all ears as this will be my first bear hunt! Plenty of Whitetail & Turkey experience but no bears....