I' m not sure what your problem is with deer, but between myself and the 6 guys I hunt with in the Northeast shooting Spitfires (100gr) we' ve put over 30 deer down in the last 2 years. I' d say 80% complete pass throughs, the other 20% was a far shoulder. We all shoot 65-70lbs with different makes and models of bows and arrows. In the last 3 years as a group we' ve taken 8 black bears, only 1 was not a complete pass through and that was a far shoulder, and not tiny bears either a 400lber, a couple of 300+' s and the rest were 200lb' s up.

My 2 friends have hunted elk in New Mexico the last 2 years with an outfitter, and they' ve got 3 elk with Spitfires. 1 shot was a complete pass through, 1 was 3/4 out the other side and 1 was buried in the far shoulder. All died within 100 yards of the shot.

Mechanicals will kill any animal as cleanly as a fixed blade broadhead if put in the right spot with the right set up. That being said, if you are not getting through a deer like butter with your current setup I' d agree with every person here that a fixed blade set up may be better for you. I' d also look into why a 70lb bow isn' t getting your broadheads cleanly through deer as that is not normal, not by a long shot.