I love my Mosin, only thing I don't like is having to clean it with ammonia after shooting. I have a 1931 hex head, 91/30 also a M44, great little carbine. Love taking it to Camp Perry to use in the Vintage Rifle matchs, makes shooters next to me take notice thats for sure. The Mosin is a fine piece of history, that is readily available, inexpensive and fairly accurate. In answer to your question as to whats the difference between a reg. 91/30 and a sniper, is the sniper comes with a scope attachement and scope. The bolt handle is bent down to accomadate the scope. The scope itself is a three recticle little number. Personally, I love these kinds of scopes. When your buying a sniper rifle your buying the scope, and different bolt. As far as I know thats the only difference. If anyone knows something different, I'd love to know.
Those that do not study history are doomed to repeat it.