ORIGINAL: Tobe_B
Long range to me is anything over 300. I work at a ranch down on Palo Duro Canyon on the weekends and a lot of what I am doing is shooting hogs. I can get up to with about twenty yards during the day before I start shooting, but I want the ability to keep shooting and making lethal shots at ranges between 300 and 400 yards. I know the .223 has the ability go that far, but as for the punch at the other end, I don't really know if it has what it takes. But the .308 might, but I don't know because I have never even shot a .308, all I know is what the balistic charts tell me.
A 308 has plenty for hogs out to 500 yards. I wouldnt push shots much farther then that. As for using an AR or any semi auto for shooting that far i would really not recomend it. The only AR style rifles ive seen capible of being accurate that thos ranges are high end bull barrel AR's in 223, or 223 Wylde chamber. I would get a good bolt gun if i was you.