I recently thought about reloading 7.62x39 because Hornady discontinued their SST steel cased ammo (my CZ 527 loved them). Then came an idea about a MK 262 clone. I started noticing a theme. Here's the thing: I don't case-prep at the moment (new to reloading), so I probably wouldn't be reusing casings. I also don't care much for buying casings online unless I find them dirt cheap. I thought it might be practical if I reload from once-fired factory brass, and since I have practice/range/drill guns that shoot 5.56 NATO and 7.62x39, I could save by cleaning and re-priming fired casings from drills. The cheap 7.62x39 casings I use for drills could be reloaded into SST rounds for my CZ527, and my practice 5.56 brass could be loaded with 77gr bullets for my SPR project. 2 questions: 1. Should I be worried about using once-fired cheap brass for reloads if I'm only going to use it once. Is this a viable idea overall? 2. What other cartridges do you know that have cheap range/surplus ammo as well as precision/hunting applications. For example: .308 Win. It has dirt cheap surplus (7.62x51) and higher end match rounds.