So you are saying that a CZ chambered in 223 is to be avoided? And I gather that you don't like 308 CZ's either. Any CZ rifle worth buying?
No. A CZ527 in .223 needs a little more break-in and sometimes a bit of magazine lip manipulation to get it feeding right. The .222 version works a bit more efficiently out of the box. Some people like to have a rifle that is ready to go, so to speak, even if it lacks a genuine safety catch or a detachable magazine (green box?); and some people are happy to do a bit of extra fiddling if they can use cheaper ammo.
The .308 family feed quite well out of CZ rifles (and Sakos) but do not always work so well in cheaper rifles BUT the .308 family and the .223 Rem are prone to extraction problems when heavily loaded, due to their relatively straight taper. Gunwriters and loading manual writers often talk about military brass being thicker due to headspace issues in hot machineguns (and rifles with violent case extraction) but to the best of my knowledge that expedient has only ever been necessary with the .30-06, 7.62x51 and 5.56x45/.223Rem.
If you plan to do a lot of fast shooting at goats, the .222 is a better choice than the .223 for ultimate reliability of feeding with the single column magazine and, although a bit straighter than desirable (for military purposes), the .30-06 does feed more reliably than the (.012 body taper) 7.62x51/.308, which in my opinion is a more significant reason for its continuing popularity than its ability to handle bigger bullets and cast lead bullets.
If you want a .223, expect to spend a little more time fettling it, and do not attempt to load to military pressures. whatever you do, have fun.
