Does 300BLK come in non-AR format?
NM, i see that it does.
It does but it would be impractical to not buy it in an AR platform. That way you already have an AR lower and you can buy multiple uppers. Man I love advising others to spend a ton of money...
I would vote as oleyeller...7m-08 with reduced recoil corelokts.
.260 Remington is also good. All share the same 308 parent case.
Here's how they stack up:
.308 Win = .308" bullet (7.62mm)
7mm-08 = 7mm bullet
.260 Remington = .264" (6.5mm)
.243 Win = .244" (6mm)
So the heavier you go, the more felt recoil you are likely to feel. But a faster bullet is more likely to fragment, so choose 243 ammo carefully if you choose that one. I killed my first deer with my dad's 260 FWIW.