I bought a mint older 452 American 22lr a few weeks ago. Bought it to introduce a close friend's son into precision shooting. We are going to do a Yo Dave job on it this week. I have a 17 hmr 452 and am amazed at the price vs. quality of these rifles. Briefly had a 455 22lr. My particular 455 did not shoot as well as anticipated. Tried many different brands of target and match ammo. Do most CZ fans prefer the 452 to the 455? My experience with a so so 455 could be an isolated event.