Bolt lift clearing the ocular bell would be my concern. I suspect the CZ rings are high enough that a 56mm OB will fit but its likely not necessary. How about a VX6-HD with top power in the 18-24 range? Great optics and easy to dial with good RTZ.
Just looked and the 4-24 power scopes are 34mm so that puts you back with the 3-18x44 which is a great scope. There are lots of other brands too.
Thanks for the recommendation. Will take a look at VX6HD 3-18 in store. It does make a nice bench and walking varmint rifle. Have a VX6 1-6 that is excellent on the CZ 527 X39 carbine.
Would love to try a 24X or higher magnification scope for those little ground squirrels at distance. I am intrigued by the NF NX8 4-32x50, 30mm tube. Wonder how it compares to the NXS 8-32x56 optically at 24X or 32X.
Talked to Warne about 34mm rings for the 527, no plan...34mm rings would open up to a world of excellent optics.