I did some quick research and found that for the most part, only several southern states that do not restrict magazine capacity when hunting deer. SC, TX, GA. Other states do not restrict capacity unless you are using a Semi Auto rifle, then most are 5 or less, some are also 10 (KY)
When hunting migratory birds (geese ducks etc) the FEDERAL law is no more than 2 rounds in the magazine.
When I see people talking about deer hunting with 30 round magazines I have to wonder if they aren't full of shit.
In many states it is illegal to shoot deer with a rimfire cartridge, some other states limit the minimum caliber size to .25+ eliminating hunting with a .223 or 22-250.
What state are you in? If you don't mind telling.