Con;....
Please note I'm not holding our system up as an example of perfection though, as you will note we can not hunt bison with anything less than a 175gr bullet, but it is legal to hunt an equal sized bull moose with a .17 Rem - or a grizzly which will kill and eat either one for breakfast.
Regards,
Dwayne
Idaho's game caliber law is even worse. Here, we can hunt any big game with any centerfire. That's the only limitation. We can hunt bear or moose with a 40 gr varmint bullet in a .22 Hornet if we want to. Luckily, most hunters I know have a lot more sense and use guns adequate for the job.