Bullets just aren't moving fast enough to reliably expand. They drill small holes in and out. Too much game wounded and lost when the shots get much past 200.
as long as the vitals are damaged the size of entry and exit have almost nothing to do with death. Maybe how long, like it adds a few minutes or seconds but thats it.
I STRIVE that all our deer are caliber entry and small fingernail exit and they go down just fine to astonishing ranges.
If you are of the I have to shoulder shoot and demand a bang flop for whatever reason then picking a Grendel knowing its a slower round was stupid.
All that said the 6x6.8 isn't fast with an 85 grain and its results have been the same also. And results same from nephews 6.8 and X39. They just don't kill like 257 wtby speed but I've killed past 500 with most of the above without issue.
