I shot some of them when I had the .22 barrel on my Short.
Accuracy out to 55 yards equal to any other JSB from the CZ barrel.
They do open up at further distances though from shooting at paper targets.
Can only remember popping one critter with them, a usually very difficult to anchor ground squirrel. THWWOPPPP and he was dead without a twitch, fell off the old pile of tires he was sitting on like a sack of taters. Didnt do a dissection or retrieve the pellet but it entered a his chest, not quite midline, bisecting the boiler room and could see the fur pushed out on the opposite side in the rib area.
I'd say pretty decent critter popper, but would recommend 60ish yards or less.