The basic Slavia 630 sold (at least traditionally) by Home Hardware is more than capable of cleanly killing anything up to cottontail sized game, if it is treated like a pellet gun and not a .22. Keep the shots close, head shots for recovery or boiler shots if the gopher is to be pre-buried. Crows will fly 150 yards then plummet -- much like a deer shot with a 30-06. Magpies, pigeons, toast. Rabbits through the head toast. Blackbirds, starlings, toast (Alberta legal). Hardest to kill are gray squirrels because their skin is very tough.