Take a good look at a mid to high end Savage in the .243 Winchester.
The Mossberg has a 10-inch twist barrel and may have a lot of trouble stabilizing the heavier bullets you will want for your long range shooting. My Model 16 has a 9.25-inch twist barrel.
Further, swapping to an even tighter twist barrel is straightforward with the Savage system. You will want something faster if you start using the heavier match bullets intended for serious long range shooting.
Regarding the .308 it does indeed do well, but the seemingly dinky 6.5 Grendel will do as well or better at those long ranges. Both it and the .243 Win have about half the recoil energy than one sees with long range bullets in the .308 Winchester.
The Mossberg has a 10-inch twist barrel and may have a lot of trouble stabilizing the heavier bullets you will want for your long range shooting. My Model 16 has a 9.25-inch twist barrel.
Further, swapping to an even tighter twist barrel is straightforward with the Savage system. You will want something faster if you start using the heavier match bullets intended for serious long range shooting.
Regarding the .308 it does indeed do well, but the seemingly dinky 6.5 Grendel will do as well or better at those long ranges. Both it and the .243 Win have about half the recoil energy than one sees with long range bullets in the .308 Winchester.