varying wind and elevation conditions? you got moving targets to practice on? you know what a PITA it is to even SCORE targets at that range? 308 wont even MOVE a steel man's torso enough at that range, for you to be able to TELL that you hit it, unless it's of such thin metal as to be RUINED with a lousy 100 hits. Make it 1/2" thick, and it won't even twitch from a 308 hit, if it's 12" wide and 24" tall, if it's suspended in any way that can withstand a 308 rifle bullet hit to the suspension-method. You wanna have to walk down there and back, every time a bullet cuts the chain links or wire, hmm? Be about once every 100 shots.
It will take you all DAY to fire that many shots, in a way that you LEARN anything about such shooting. Just how often will you GET such practice, hmm? At 600 yds and closer, you can get the same hits with 223, and spend HALF as much on the rifle and the ammo.
So, basically, VERY few men have ANY ability to "outreach" a good 223-AR, because either their local terrain doesn't PERMIT such shots, or they don't' have the practical skills to make ANY rifle or load make such hits. The 308 is actually a rather poor choice for such shots. Even the 243, with the VLD bullet, is better against the wind and gravity, and the 300 win mag makes the 308 look sick by comparison. That extra 300-400 fps (depending upon bullet wt) is worth a lot at the longer ranges.
So, basically, VERY few men have ANY ability to "outreach" a good 223-AR, because either their local terrain doesn't PERMIT such shots, or they don't' have the practical skills to make ANY rifle or load make such hits. The 308 is actually a rather poor choice for such shots. Even the 243, with the VLD bullet, is better against the wind and gravity, and the 300 win mag makes the 308 look sick by comparison. That extra 300-400 fps (depending upon bullet wt) is worth a lot at the longer ranges.