Congratulations on a very nice rifle & some good shooting, w/ iron sights.
These CZ's (including rimfires) are nice rifles and I'm very impressed with the 527's set-trigger.
I have the Varmint model of the same rifle. She's a heck of a good shooter and pretty to boot - my only complaint with mine is that the 1:12 barrel twist doesn't allow me to shoot anything heavier than 55gn bullets. I buy custom reloads from one of the locals and have the best accuracy with 40gn V-Max bullets.

Bruce

CZ527 Varmint .223 w/ Bushnell Elite 4200 6-24x40AO