Rat isn't bad, it depends on how it was raised. I wouldnt eat sewer rat... ever...

I have a Crossman .177 cal break open pellet rifle. It's only supposed to put out 1000 fps, but on cooler days it has exhibited ballistic crack, so it has shot faster than 1200 fps.

I also field a Savage Model II .22 LR bolt action repeater. I mounted a Redfield Tracker on top of it, and I've taken several prairie dogs out past 300 yards with it. I try not to hit then with it past that range, because it doesn't reliably kill with the first hit, but it's a tack driver, no doubt.