Welcome to the world of Milsurp rifles. I saw Enemy at the Gates a couple months ago, and since then, I have purchased ten rifles (I think). The M44 shoots the same ammo as the 91/30, the M39 and others. I have been shooting them alot, but have tried to stay away from the corrosive ammo. I have shot it and tried several cleaning methods. As far as I know, they all worked; I don't see any rust or corrosion yet. The best way to clean with water IMHO is to get the hottest water you can. I boil a pot of water and add it to hot tap water. With the action out of the stock, I stick the muzzle end of the barrel in the bucket and pump the water through the barrel with a cleaning rod and patch. Assuming you have the water hot enough, the water will evaporate almost as soon as you take the barreled action out of the bucket. Some recommend using GI bore cleaner. The last time, I just cleaned it with Hoppes and let it go at that.
I have never bought a milsurp rifle at Big 5, but a number of my friends have. They all looked and shot fine. The VZ24 is a terrific rifle; much better than the 'Nagant. S&B makes non corrosive ammo along with Winchester. It costs more, but I am willing to pay the extra money to get the reloadable brass and the piece of mind.