For the record, I'd be surprised if anyone could accurately take down a drone. Shooting is a lot harder than video games and movies make it seem; there's a good reason we use shotguns for shooting birds out of the sky instead of trying to peg them with varmint rifles.
Sure, a high power hunting rifle or a .50 caliber anti-materiel rifle could probably knock a drone out of the sky on the first shot. The question is how you're going to HIT it when you've only got a few rounds in the magazine and no capacity for rapid fire.