from the regs book it says 5 for big game. nothing for small game/predators. for shotguns you can only hold 2 in the tube and 1 in the chamber and must have a plug or other device to achieve that limit.
it also says no full autos.
it says nothing about mag capacity or what mag comes with a semi-auto from the factory. what if you made your own? technically building an AR is assembling your own gun, it comes with no mag from the factory as a stripped lower or complete lower.
so you can hunt with a 100 beta mag for coyotes and p-dogs and other small game if you want.