I like to use my cx lux for the hunter class in rimfire silhouette's with a 20x scope.
[IMG][/IMG]
Back in 2008 I did a little work on the bolt/firing pin, trigger and bbl throat to tighten the lux's groups up. It paid off in spades, some 5-shot groups @25yds with low grade match ammo.
[IMG][/IMG]
Some 5-shot groups @ 50yd's with a little better grade of match ammo.
[IMG][/IMG]
I have no idea what chamber they are using in the 455's. My 452 (1996) lux has a 18mm in it. 18mm (.709") is not a match chamber by any means but it is tighter than a standard sporter chamber.
[IMG][/IMG]
I tend to look for longer bullets/brands to test in the lux, the longer chamber likes longer bullets. To put it in perspective the SK standard+ and sk pistol match are 30/1000th's longer than the black box eley eps. That's why you see allot of cz owners recommending sk+ along with the 10-22 owners with their match grade bbl's with the bentz chambers.
[IMG][/IMG]
Enjoy you cz