I need a 308 Minimum as I way into herds of Buffalo more than pigs.

Maybe one of those 458 AR 15's from SOCOM would be the go !!!

But a good semi-auto on a mob of pigs would be nice once
in a while. Nothing like 10 - 20 pigs spread around dead,
the only problem is we don't get the mobs we used to like in the past - drought, chopper shoots etc.