Well most of the published tables are just mathematical predictions, the only real way of knowing its buy shooting and shooting a lot, put a lot more rounds down range, keep good notes on each shot fired along with, the Alt, Temp and humidity of were you are after a bit you will have a good average, make up your own chart and then just go hunting! I use to be into this sort of thing, but after a while, I figured that if I just do a 200 yard zero and keep on hair, I am going to make good hits as far as I have any business shooting big game! Have fun with it, after all its suppose to be a fun enjoyable hobby!
