Sorry Troy, but I don't have a clue what CDNN stands for, my LGS made me an offer I can't hardly refuse for a brand new one for right at $300.00 OTD, I can replace the stock for right at $!83.00 at Boyd's for a grand total of $583.00, I already have a couple of scopes, I can place on it. My only concern was that I've heard quite a few complaints on there magazines not being secure. BTW I'd be interested in that Ruger M77 Hawkeye at that price. I'm in no big hurry, as my son is still living local, but his job has him moving in August.