I have a CZ 453 American, a CZ 453 Varmint, a CZ 455 Varmint, a CZ 455 Varmint Tacticool, and a CZ 513 "Farmer" (built on the CZ 452 action, but with a truly horrible trigger).
The CZ 453 American is a consistent 1 MOA, 5 shot group rifle at 100 yards with SK Standard Plus. The single set trigger is very, very good for a factory trigger. Seen here in between a Winchester Model 52 Sporter reissue and a Ruger 10/22:
The CZ 455 Tacticool demonstrates the same accuracy and consistency with the same ammo.
Both hold their own with my Bergara B14R.
The CZ 455 varmint is a consistent 1.25 MOA 5 shot group rifle at 100 yards with the same SK ammo.
Despite it's better single set trigger, the CZ 453 Varmint averages 1 MOA but seems to have .5 MOA and 1.5 MOA groups in about equal proportion with SK Std. Plus, so while the average is the 1 MOA, its not nearly as consistent, and I classify it as a 1.5 MOA rifle at 100 yards.
The dark horse here is the CZ 513 Farmer, designed and marketed as the budget rifle in the CZ line. It uses an entirely different trigger design, one that is non adjustable, and extremely heavy. That said, if you can manage the trigger, it demonstrates the best mechanical accuracy.
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In summary, in my experience with a number of CZs and based on feed back from other CZ owners, CZ rimfires in general are accurate adult sized sporters, on par with more expensive sporters like the Kimber Model 82, in terms of quality and accuracy, if not fit and finish, and generally slightly more accurate than the Winchester Model 52 reissue sporters, but no where near close in terms of fit and finish.
But...the CZ 452/453/455/457 series do vary a bit in terms of accuracy rifle to rifle, so they can be a bit of a crap shoot. But then again a "bad" CZ rimfire will still be a 1.5 MOA rifle at 100 yards with mid grade target ammo.
it will get the job done. Sniping squirrels is a worthwhile activity.
