I have a CZ 527 7.62x39 Carbine I bought when they first came out maybe in 2003 or so that I am very pleased with, no issues. Same for an older ZKK 602 375 H&H though I am currently getting the barrel snipped to 23". I prefer it over the M70 equivalent having owned one. Mine is smooth as can be and feeds and ejects anything flawlessly. I prefer my NH Win 416 Rem over the new CZ though. While I don't own a SC gun, I do believe that Winchester is and will continue to put a serious hurt on CZ sales.