RE: Decreasing poundage for Turkeys
Simple. 2 reasons.
1. The bow is easier to draw inside a blind and sitting down.
2. This is the better reason, to drop the KE limiting penetration. You really don't want a pass through on a turkey. Unless you bust their wings they will fly off. Shoot a big mechanical head, drop the poundage and burn up the KE keeping the arrow in the bird.