I'd shoot a moose at 600 with .308 and a mono......if I can judge the shot properly and am confident of proper placement. My old 1SG teaches folks to shoot 1500 yds with his .308 and 20 inch Barrel. If you have the skills, it can be done
.308 win covers all of your criteria. Hand loads for .308 win REALLY covers it. Not a magnum.......not a new kid in town.......just a good cartridge available everywhere on earth.
You got a semi auto revolver? I hear those are as hard to come by as chicken teeth? Let a brother know if you see another one worth picking up?......... Webley revolvers, whether semi auto or standard type ARE becoming more rare. I believe there were on a couple specimens of the semi made for...
Does the bullet need to be supersonic at 1200 yds? Not sure that was one of the criteria. Hunting out to approximately 400 yds, check. Punching steel out to 1200, check. Skill required, check.
My old 1SG who teaches long range shooting bangs a gong at 1500 yds with his factory Savage 20 inch 308 just to show people it can be done. The only thing he did to the rifle was bed it and put on a vortex.
Shoot whatever makes you happy and puts em on the ground. I don't have, or prefer, a 6.5 creedmoor. That doesn't mean they're not a useful tool. Neither are my tattoos the same as anyone else's. Reiterating what has already been said, do what you do....... legally and ethically. I always enjoy...