CZ ...anything
Just about anything made by CZ in rimfire will have you smiling like a little boy after you shoot it!
Find some decent ammo...companies like Norma, or Geco, Wolf, or any ammo by Eley or Lapua. They should shoot Winchester, Thunderbolt or CCI, ok...but if you really want to see what they can do try one of the first 5 ammo types.
For more info than you can handle...check out RimfireCentral.com
Whitaker's Gun's, Bud's Gun shop, etc. will have them. The CZ 455 series (452 series are phasing out) allows you quickly change barrels into .17 and .22mag.
Use SlickGuns.com...they sift through all the pricing and show all the current companies prices....
Fair warning...
once you shoot/own 1 CZ you WILL be infected with CZ' itis....
it is a cruel and wicked illness that will leave you smiling WAY too much at the range!
And will have a constant ringing in your ear, from all your range buddies bitchin' because you are cheating somehow and because you won't share!
You have been warned! Psst! they have "trainers" and HB varmint styles as well....you didn't see anything..I was Never here!