Don’t buy a cz527 in 223 assuming it will shoot nosler and heavy Barnes bullets. It’s a great rifle I love mine and every barrel is different so your results maybe different but I can’t get my 223 CZ527 to shoot 60 gr partions or the 55gr Barnes into groups smaller than a pie plate at 100 yards even got some hitting the paper sideways. It groups light weigh 40-50gr bullets well in every factory load I’ve tried and I have found a handload that groups well with a few different bullets in this weigh range but mine doesn’t like heavy bullets at all. I was told CZ has changed the twist rate in the 527’s in 223 since it was first released mine was purchased new about 20 years ago so beware your results may be different if you get a factory new rifle vs buying an older one.