For hunting on a case that fits in an AR mag length, give me the 6.8 over the 6.5. If I’m going smaller than the 6.8 in bore size, I’d look to the 6 ARC (or other 6) or stick with 223. Purely anecdotal, but I got more exits, better blood trails, and stuff died faster moving to the 6.8….even with the same bullets in lighter weights. Again, if I was shooting past 250 much and in more open terrain, or running longer barrels to get max advantage from the case, the pros of the 6.5 might have become evident. I’d think a ARC would be even better at that, but I haven’t done that one. For shooting deer/hogs inside 250-300? The bigger bullet diameter seemed to matter more. I’m sure others have had differing experiences, and they gotta go with what they like. That Fusion/Gold dot 90gr punches far above its weight class, too. 75% of my deer fall to a 110gr NAB leaving out better than 2500. How much faster doesn’t seem to matter. Again, just anecdotal from shooting stuff.