I have a rhino 2.5-10 x 26 fixed PX. parallax error is directly proportional to objective lens size, so this scope will have half the PA issues of a 50mm.

PX is set to 32 yards, and it's perfectly clear on 10x from around 22 to 42 yards, with a hint of fuzziness 42-45 and 18-22. Beyond that it is a little out, but perfectly shootable from 5-55. Of course you can just turn the mag down if needed for the closer range work I don't shoot beyond 55 anyways