I suppose you could just get a nagant. You could purchase a nagant, a UTG dovetail-to-weaver adapter, and a "for now" cheap scout scope or pistol scope for about $200 and ammo is dirt, dirt cheap. Ballistically, the 7.62x54r cartridge falls somewhere between a .308 and a .30/06. By the way, the rear sight is removeable from the nagant and it reveals a dovetail to mount your adapter to. You can get a cheap long eye releif scope for $60-70, the adapter for around $20, and the rifle for about $100 at a gun show. It would make a great project as well, there are some great videos on youtube of people getting creative with the nagant. Whatever you get, i promise it won't be your last...