My current setup is a CZ550 with CZ rings and a Leupold 1.75-6x32mm. I'm finding that the current scope doesn't have enough vertical adjustment for my taste. According to my paperwork, the 1.75 has an adjustment range of 50 MOA. As it is the scope is pretty much maxed out...I'm hitting dead-on at 100 yards with 235 grainers, but still hitting low with the 300s. Don't have enough room to adjust for, say, 1.5" high at 100 yards with the 235s. Or, for that matter, simply getting the 300s on at 100.
So, I'm gonna switch to the Leupold 1.5-5x20mm as it has an adjustment range of 120 MOA. Not losing much in magnification (1.1 actual magnification high, .4 low) so not too bad there. Should be here on the 8th.