43shooter: I am happy some fellow CampFirers have replied to your question.
I have MANY Varmint Rifles in 223 Remington but only one was set-up with LaPua brass.
And that all factory stock Rifle is stunningly accurate.
That Rifle is a Remington XR-100 (single shot, bolt action, 26" heavy barrel) with a Leupold 8.5x25 variable scope which helped me make the smallest grouping I have ever shot with an all stock factory Rifle (non-40-X Rifle)!
That 5 shot group at 100 yards measured .121"
Sounds like you and your CZ are as interested in Varminting as much as accuracy so I wanted to relay this to you - my loading in the XR-100 in 223 Remington uses the wonderful LaPua brass, Federal 205M Match primers, Berger 52 grain MEF bullets and H 335 powder.
My LaPua brass are only on their third reloading so I can not comment on "brass life" but I am sure the consistency of the LaPua brass has a lot to do with the excellent accuracy I am getting.
Hold into the wind
VarmintGuy