Not CZ but I've just gotten back into airguns after a 45 year absence. First a 1946 Crosman 101 pump rifle in .22 needing extensive work and then a 1965-1966 Crosman 150 .22 CO2 cartridge pistol in 95+% condition but needing internal work. Had some valve work done on the 150 by Rick Willnecker at Precision Pellet then I rebuilt with new seals and all I can say is WOW! [101 needs a bunch of serious work so it's being slowly restored.]
Great fun with a large bean can at 50' and fairly easy to shoot 1"-2" groups. Bean can's heavier than soup cans but on second hammer notch for high power level a pellet cuts clean through both sides of can and keeps a goin' yonder! At first level it cuts through one side and deeply dents and partly tears backside. Have to weight can half full of little rocks to hold it still. Got about 40 shots out of 1 CO2 cartridge.
I imagine that properly bench rested with the right pellet and a standard target at 50' it will shoot out the bullseye to boredom. Didn't realize until much later after target practice that it was all done while wearing my reading glasses, not my distance Rx, so no idea how accurate the little bugger really is when I can actually see what I'm shooting at!
Just a whole bunch of good clean fun for an old coot and his pals! Build that range, you'll love it!!