Mostly because the Norc has the old WWI trenchgun feel to it.
I bought one a few years ago from Marstar which I only recently sold as I came into a 1942 original. The Norinco smoothed up alot with use and a bit of loving gunsmithing to work down some of the worse rough patches. I found with slamfire/tactical use the heat shield would work its way forward along the barrel until the mag tube disconnected. I didn't really fix the problem before I sold it. Other than that it was a great gun. Alot of the folks I shoot Cowboy Action with have the regular 1897 and everyone thinks they are great (which is a loaded question, if they didn't like them they wouldn't have them anymore and I wouldn't have asked in the first place!)