ORIGINAL: TFOX
The arrow will not gain enough speed in a hunting distance that one could ever notice.The uphill shot is shot the exact same way so that eliminates that from the equation,atleast at close distances.
Now in field archery shooting 80 yard shots uphill or downhill,then there might be some validity to that argument.
I've long since put away my Physics books, actually, sold them because as ALL COLLEGE students seemed to be, I needed money. But I thoughtthat an arrow DID gain a small amount of velocity, but you're probably right, it's not enough really that most of us would know the difference. I do know that for me, a longuphill shot shoots for more like 43-44yds rather than the 40 that my RF tells me it is. And I believe that IS due to loss of velocity.