ORIGINAL: Straightarrow
This sure would explain why I see so many 70 lb compounds shooting light arrows that barely penetrate whitetails on TV shows. It also helps explain why a guy shooting a 35 lb longbow with a 650 gr arrow, can have all passthroughs on the 17 whitetails he shot at in one year.
Not only that, but arrows that derive their momentum from velocity (those 70 lb compounds shooting light arrows that barely penetrate whitetails on TV shows) loose their momentum at a much more rapid rate that arrows that derive their momentum from mass. Thus the statement from Dr. Ashby:
"
ALL MOMENTUM IS NOT THE SAME
Given two arrows, identical in shaft and broadhead materials and profile, and having EQUAL momentum, but possessing UNEQUAL mass, the arrow deriving the greater portion of its momentum from its mass will penetrate better. The Laws of Physics requires this to be true, and
ALL of my field test data validates this to be the case."
This is all fascinating material. The science isso fundamentally sound as to make his conclusionsirrefutable!