I brought 4 rifles to the local indoor range yesterday. Overall I'm happy with the 3 cz's. The first was a new cz 512 with a hawk vantage ir 22 wmr 4x12x40. Using fiocchi 40 gr hp, I shot 1 inch groups at 100 yds.
. Next on the list was a cz 452 with an old Tasco 6x24 scope. I plan on using it more for hunting, so I shot rem viper. No good. 3 inch groups at 50. Stingers wouldn't chamber. Cci minimags (old box) 3/4 inch groups at 50. Cci minimags (new box), about the same. The best shooting were the minimags segmented hp at 1/2 inch. Last of the rimfire was my favorite, a cz 457 varmint 16 inch threaded barrel with a Bushnell 6x18 rimfire. This is my in town squirrel rifle so low noise is the goal. All were 40gr subsonic hp ammo. Remington and cci both shot just under 1/2 inch. Eley was a little better. Fiocchi shot into a nice small cluster of 1/4 inch. The best was RWS. 5 into a single hole of .06 all at 50 yds. The last was a ruger number 3 22 hornet.
Still chasing a load for it. I plan on doing some work on the rifle and try again. Great day for the CZ's