RE: sks
I have a chinese model that I have scoped. Lots of fun for plinking. I bought a bullet mold from lee which cuts down on the expense of firing it for you can go through tons of rounds. Like a big .22. I also load 123 grain bullets (Hornady) which are not too expensive. I believe that you can also get surplus military rounds for cheap if you buy them in bulk but you can't reload the military brass. There are lots of reloading receipies online for the 7.62x39. Very inexpensive to reload. It's also fun just shooting it from the hip.