I sent my 455 back to CZ for accuracy issues. Turned out it was the scope. They returned a test target. Gecco is their primary test ammo and they tried a few other quality brands. The best results, by good margin, came from Blazer, something I never heard of. Needless to say I stocked up. It is (or was) dirt cheap! My Ruger SR22 won't digest it though, only likes copper coated bullets.
