This is more a theory question than anything. But the premise is based on my farm, where distances are limited to 560 or so yards. Shots are usually quick. I'm trying to find the best round from the muzzle to 500yds as far as trajectory. What I have come up with is the .270 Weatherby Magnum with a 135gr Sierra Matchking and 7828. Wondering if anyone can find anything flatter within that range, suitable to kill a whitetail deer with?