What Does It Take - to Hunt Medium/Large Game at 600 Yards?

shooting a good group centered on target at 600 yards.

I have done that with 7mmRM and 6.5-06.

That is my upper limit.

Bart Bobbitt in 1997 shot a 3.25" (20) shot group at 800 yards with a 308.

I will never be able to shoot like Bart Bobbitt.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps