Okay, I'll revive this post. It's not too old.
I don't own, nor have I shot either a CZ-452 or Marlin 39A
. But I'd love to own both
! As I said, I have no experience with either, but given all I've gathered over the years, I'd say unless you get a screwed up example, either should be capable of sub-MOA accuracy. That is certainly nothing to sneeze at or complain about. I'd bet a lot of folks can't take advantage of the full mechanical accuracy anyway, but it is fun to try of course.
I plan on picking up a CZ Trainer myself in the next few weeks and shoot with only the irons for a while. Should be a lot of fun. Then I'll add a 39A later.