140 amax or 130/140 vld berger =800yds. is a long ways out yonder.
I can attest to the [7mm] 162gr. amax's killing power at longrange -devastating.
There was some youtube video of a guy shooting feral sheep in new zealand -almost all bang-flops at 4/5/600yds. He was shooting a 7-08 most of the critters bounced off the ground while some cringed buckled and fell over.