There is a slought decrease in case capacity in the WOA vs the 6X6.8, from Black Hole, so don't go overboard in straight adaptdation
On the 87 Hornady BTHP's out of my RPG built 6X6.8 24" I'm getting:
3041 29.0 8208
3081 30.0 8208
3078 30.2 RL15
3086 29.5 TAC
3153 31.5 CFE
Be aware this is a BHW 3P POLYGON Barrel. It will be faster than a standard rifled barrel. Also, this is my barrel, my fingers and my judgement.
Across the board on target a WOA, a DTI and a standrd 6X6.8 isn't going to make a spit of diferrence on deer, PD's or paper. It comes down to cost, availablity and your degree of interest in the intracacies of relaoding any of them.
Greg