SSAs factory loads for the 6.8 are pushing 115gr bullets 2690-2700 fps from a 16" barrel now. He tells me he wants to develop a real +p load for barrels with the correct twist and chamber lke the DMR chamber and 11-12 twist. I pointed him toward the Swiss powders like RE17(not using RE17 just powders made with the same process) to get more velocity out of the same charge.
The 85gr TSX loads he has now are 3000fps.
With hand loads I can get 2950fps from a 110 Accubond or 110 Barnes TSX out of a 20" barrel, and 3200 with the 85 TSX.
The max distance at my range is 464 yds. I set my 308 and my 6.8 for 300 yds zeros, at 464yds the 6.8 needs less come up with 110gr hunting bullets than my 308 does with 155gr Lapua match bullets.
Terminal results on animals is great, we shot several hogs in Texas a few months ago then decided to shoot one large hog apx 275lbs through the thickest part of the shoulder with the 110 TSX and a 80gr GS custom bullet. We set the hog at 100 yds and shot the TSX at 2900fps through both shoulders it destroyed both shoulders and exited, The little 80gr GS custom did the same.
The 110 Sierra Prohunter would be better for deer but killed several hogs that weekend, The prohunter went through the first shoulder but hit the inside of the far shoulder busting it but it did not exit.
On a deer or hog a Prohunter would work well in a heart lung shot, If you like to blow their shoulders where they don’t run A Barnes TSX or TTSX will work better.
Two years ago I dropped a mule deer at 428yds with a 110gr Prohunter, this year I shot an elk at 372yds with a 110 Accubond. I was hunting deer again but had an elk tag so I took the shot when the elk stepped forward with his left front exposing the heart area. I am not recommending the 6.8 as an elk rifle but it can be done if you wait for that perfect shot.