No, no Cz-52 here. Only a Tok. I wouldn't mind buying loaded, but it's not typically available here (only two sources within 150mi and they look at you funny & shake their head when you ask for it). That automatically means shipping & hazmat, which prohibitively balloons the $.
If my sources are correct, the .223 base is about .012" smaller OD, is this critical? I have a cheap, local source of 223 and don't mind the hassles. But if it's not any stronger than Starline, there's no point going there.