I had the sister rifle and the best group I could get was an embarrassment. If I was lucky maybey a 1" group at 40m. I tried everything to get the Acuracy up including every ammo I could get my hands on. Elly, SK, Wolf, Remington, Winchester, federal, CCI, and finally found some Fiocchi ammo that started to prove viable however still only able to get .75" at 40m. I compare that to my savage BTVS and I get .75" at 100m with that rifle using CCI standard velocity. Now I have. I doubt that CZ makes a beautiful gun but they dropped the ball with the latest offering.
As far as CCI standards availability Italian on the west coast usually has loads of CCI and they ship pretty cheap depending on quantity purchased.
My first call would be to Henry at budget shooter supply he will usually get comparable prices on most ammo and will treat you well. Send him an email