Found my targets that I'd saved. Made this test in February of 1995, using sandbags at 100 yards and just a little bit of a breeze. The only way I can get these pictures to post is attach them, sorry. Also my CZ 452 is probably a little different than your Trainer. Mine says Sporter. It has tangent Rear sights, Interchangable front sights, adjustable trigger. It is scoped with a Weaver Variable 16 pwr. Is it a complete different rifle than the Trainer?
UpDate Aug 18th: I read on another Forum that theTrainer and Special are the same as my Sporter. So that answers my question.
For those who can't see the pic. I used 10 rounds of Winchester T 22 ammo. 4 rounds hit the Bull, 3 rounds in the 10, and 3 rounds in the 9. They all fit well in a 2 1/2" circle. 6 were within 1 1/4" of each other. The other pic is my 1992 CZ 452 BRNO 2-E with tanget rear sights. A Weaver variable scope on Weaver see thru mounts.