ORIGINAL: TFOX
There are MANY factors the come into play when thinking about POTENTIAL penetration that most are completely oblivious too.
Arrow weight,diameter,foc,material of arrow,mass thickness,tune,broadhead style,speed,ke,momentum,all come into play in POTENTIAL penetration.
I agree! Nothing is B&W. Most of the times added weight will increase KE out of the same bow.
I prefer at least 6 grains per pound on my hunting setups because the game I hunt does not require extreme penetration and the flatter trajectory is many times a plus.
I really can't remember the last animal I shot that I did not get a pass through on.
Dan