Here in New Brunswick, game laws allow me to hunt Varmint, Varying Hare, and Grouse with any rifle in a caliber smaller than .23 or a shotgun with shot smaller than BB in lead or F in Steel. My father, who'se from Cape Breton, feels that NB should adopt Nova Scotia's law limiting rimfire hunting on small game and varmint only and only after the close of Deer season. Needless to say, he's not fond of seeing me shoot Grouse with the Sportster in the first place. That having been said it put 5 Grouse in the freezer last year. I haven't switched brands of ammo yet, was waiting to see what everyone's thoughts were. I hate to use something as devastating as hyper velocity for 2 reasons, 1. I've seen birds and squirrels explode from them 2. They're not particularly accurate rounds. One things that I can't seem to find locally is a sub-sonic HP LR round, it was mentioned to me they tend to be more effective on small game.