9/16 is good for some hunting rifle barrel profiles IF you're using some sort of muzzle device suppressor mount, direct thread to 9/16, or an adapter to something larger than 5/8. The 9/16 to 5/8 adapter is too thin unless it's extended so one thread is in front of the other and not overlapping, but that's generally undesirable since it's longer. It needs more shoulder than a .630" barrel provides anyway.
Interesting, I have never heard this before. I have a dead air keymo mount, so using the keymo as a suppressor mount would change your barrel threading recommendation from 1/2x28(direct thread recommendation) to 9/16 if using my keymo suppressor mount?
