Here in Montana there are no caliber or cartridge limitations for taking big game with rifles or handguns during firearms seasons. You can use rimfires if you want. I'm surprised Ingwe hasn't!
ingwe is probably a "don't ask don't tell" sort of a guy...
So, probably best to not ask...
If he was a Cajun, the round would be a given, .22 WMR, the variable would be candle power...
Different world, but they eat good, eat about anything come to think of it...
DF