Nothing against .308. It will cut a man in half a close range. I'd hate to haul one 100 miles on my back even without the ammo. If you're a great shot the 600+ yrds reach is reassuring...however, the lowly .223 is being used in competitions out to 600 yrds . Not effective as .308 but a sight easier to shoot, haul, and buy. A thousand rounds is useless if you can only carry 200...