Big tough suckers that can take several 22lr rounds at times to kill - whatever they are. And yes, I have killed jack rabbits with a RWS M34 in .22 cal. - as well as cottontails and a variety of other small game.
I have pictures here of an 8.5 lb. rabbit I killed with one shot from a Daisy 880. Don't know what the hell kind of rabbit it was but it had been living under our shed for months. It looks just like a giant cottontail but I suspect it's some sort of domestic that escaped from somewhere and took up residence under our shed. Anyway, I killed a 15 lb. coon once with that same Daisy 880. One shot, dead coon, same as that giant rabbit. It's all about shot placement {head shot in both cases} and so long as that is good it takes surprisingly little power to kill.
