I'm currently trying to decide on a MBR. Initially .308 was the only caliber I considered, and from there it was the typical M1A, FAL, PTR, Saiga debate. Now I'm backtracking a bit and wondering if 7.62x54R might offer some more options. My initial budget is limited to $1000, and I had been looking pretty hard at the PTR-91 GI. Obviously, magazine and ammo availability/cost are important factors, as well as ballistic comparison to the .308. Any advice on whether or not this is worth looking into?