I have a CZ 452 American with plenty of optics on board.
For lower priced ammo, it shoots the old Lapua Super Club quite well. Also RWS Target is good.
Upscale, the ELEY Club works best, with RWS Rifle match and Lapua Master M great also.
Since it is hardly a Match rifle, I have not bothered to run any top of the line ammo through it.
[RWS R50, R100 & Special Match; Lapua Midas & Center-X; Eley Tenex or Match EPS]
This rifle is quite a bit more Catholic in it's taste than some of my other rimfires.
Regards, Dave.