Blaine,
The obvious answer is to choose a large bore with a smaller case capacity. I think that a short 300 Magnum might do the job.
It all depends on your budget. I know shooters who rebarrel every year. I can't afford to do that so I don't shoot 1000 yds. When you shoot a three gun 1000 yd match you are really talking about well heeled shooters. 30 caliber is pretty popular because if you go any bigger the recoil becomes a problem and any smaller than that and bore erosion becomes a problem. There is always a tradeoff. A 308 Winchester is very accurate at long range, talk to some Palma shooters.
Great White North
