sorry guys, I should have been more clear. The range I belong to has long range competition for standard hunting rifles only.The targets are a maximum of 500 yds. and as close as 100 yds. The rifle can not be altered, or can it have a heavy barrel. I can use any scope I desire. I guess my question is what t3 would be better for this type of shooting, the 308, or 243. The one I use for long range target, I will put a 4x16 power mil-dot scope.

R1