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243 or 308?

4346 Views 25 Replies 15 Participants Last post by  clemmer
I am going to buy a Mossberg 100atr from bass pro, but I can't decide if I want a 243 or 308 for decently long range shooting, probably max of 600-800 yards. I don't hand load and don't like to spend a lot on high end ammo, but I just want to know which round is best for shooting at least 2" groups beyond 100yards for a budget shooter.
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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.
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