I'm currently putting my grandmother's .308 Win chambered BAR through its paces. Its 40 years old and still getting good deer heart sized groups at 50 yards with a poor shooter with no bi-pod. I'm sure with a steady rest it would easily hit 1 MOA at 100 yards. The only thing I found negative about the BAR is that its picky about its primers, it doesnt do well with deep seated or hard primers like what comes in the surplus ammo or the Wolf ammo. Feed it typical factory stuff and it'll run all day without a sweat though.
I'm already surrounded by half-dead brainless people already, the zombie apocalypse would just give me a reason to be productive and get rid of them.