The idea of test shooting "before" an actual hunt sounds like sage advice to me. "If" it were just a case of different point of impact, that could be compensated for, but if the blades are opening at the mesh, then there will be inconsistent problems.

Your buddy will most likely have to drop the mess slightly. If he hasn't shot through a blind hole before, be sure he knows where his stabilizer and upper/lower limbs are and how they flex and recoil after the shot to prevent any shooting mistakes.

iSnipe