Originally Posted by
thunderchickenfrenzy
Went by the bowshop today the guy told me that mostly it is my draw length; he said that I will get more penetration with a longer draw length and that the arrow will have alot more "punch" rather than raising my poundge, I ordered some heavier arrows (10GPI), and he said that with switching arrows and extending my draw length it will punch threw 9/10 deer if I make a good shot.
Increasing draw length will undoubtedly increase KE as the arrow speed will increase, but it's a bunch of BS in most cases because shooting too long a draw will probably cause accuracy issues with you. A ton of kinetic energy isn't worth a damn if you can't put it in the right place.
If draw length were an issue I would never have killed any of the deer I have. My draw length is 26 1/2" give or take a bit and I've shot clear through most of my deer with 315 grain arrows shooting as slow as 237 fps. If memory serves me right this produces about 39 ft/lbs of KE. Very seldom do my arrows not pass through. So anybody that tells you your problem is draw length has been smoking some very good weed.
Getting heavier arrows might help with momentum---if they are spined right and the bow is tuned to shoot them well. KE energy usually doesn't increase with a heavier arrow because the bow shoots it slower. However, the heavier arrow will have a little more momentum which might help.