To get the CZ 452-455 to shoot accurately is glass bed the action. this rifle had a bump between the trigger inlet and the magazine inlet. masking tape, modeling clay and Acura Glass. I have glass bedded 4 452's
It turned out great. It took some tinkering here and there to get it A-OK. It will shoot about 30-35 caliber size 10 shot groups with Eley Subsonic Hollow points at 50 yards. The friend I worked on it for gave up bow hunting this past fall and squirrel hunted every day he got a chance.