@ 2000 and 2400 M
Accurate and effective to about 175-200 yards.
L115A3, otherwise known as the Accuracy International Arctic Warfare. It fires the 8.58x70 cartridge (also known as .338 Lapua Magnum), and the shots made actually exceeded the projected range of the rifle.
You will have to me more specific. Do you mean any rifle that fires a 30 caliber projectile or 30/06 or 308?
I'm not quite sure about the 3006, but I know that the longest recorded kill shot with a .308 was at about one and a half miles, possibly more.
http://www.liveleak.com/view?i=b59f573156
Your question is a bit ambiguous, so I'll go with the notion you're referring to the longest confirmed kill by a sniper. That was achieved with a rifle chambered in .338 Lapua Magnum.
1000 yards or so.
1.2 miles per the us marine handbook.
200 yards
I actually meant a target, Sorry.. I didn't mean hunting
You will have to be a little more specific. target shooting, sniping, BP or CF or RF?