Hi all, I've got a Yugo SKS that has a Russian m91/30 barrel, 7.62x54R, on it, It is chambered for the 7.62x39 round, just wondering if that is something different from the norm or what, all numbers match on the rifle and I've got pics if I can figure out how to get them posted, no electro stenciling on any parts either, any help would be appreciated and thanks in advance.