Where are all the CZ 457 MTR's ???

[RETE8]

Mine seems to like the same as yours, SK Rifle Match. Thats a nice group. What other brands of ammo have you tried? Lapua?
Center X does not shoot better than SK but all my other 22LR rifles like Lapua.

I have shot CenterX and Midas+ through it and don’t notice a significant improvement with Midas+ and CenterX groups are a little looser than the SKRM.

On the other hand, Lapua OSP Pistol (average 10 shot 50 yd group below) shot groups a little tighter than the SKRM.