It seems we have consensus more or less. 63 gr is plenty, especially if it is 777, which is hotter than BP. Does your gun and projectile like it though, that is the question. Tight groups are what you look for. I can say from my experience that my groups are super at low charges of 777. Now, is it because I am less likely to tense up when I know there is a light charge in the gun? I am definetly steadier and more relaxed when I know I am not going to get THUMPED when I touch her off. Shooting is much more fun with plinking sized loads, out of my flinter. I have shot in the same hole quite a few times at 50 yards with 40 gr of 777, Never with 80 gr. I don't claim to hunt with 40 gr. but 63 gr. would do for whitetails, IMO. I might even try 63 gr. at the range next time, to see how it goes.