As a fairly new convert to CZ rifles, I can't say what the other guns do, but after shooing my new CZ 452 American, in .17 HMR today, I can tell you it prints tighter groups than the test target shows.
My test target showed a 1" group of 5 shots at 50 yds. After sighting my gun in, with CCI ammo, it printed a 3/4" five shot group, at 100 yds!
I shot two boxes of ammo through it today, and until I became a bit eye sore, it continued this type of grouping! That was with a 3x9 Tasco scope on it. I can't wait until my 6-24x44 scope arrives, so I can try to improve on these great groups!