I own and shoot both. Have killed deer with both. Have shot long range with both. People like to argue paper ballistics. They will talk about BC and Sectional Density like they are the only thing that makes a difference and you will be a a significant disadvantage if you don't buy something like a Creedmore. The truth is not nearly that simple. The #1 factor that will determine your success with a rifle is the skill of the jerker on the trigger. No ballistic advantage of ANY cartridge will allow you to outperform a highly skilled rifleman. I'd put my money on a high master shooting a lowly .308 over a Expert with a 6.5 any day of the week and in any windage situation. I've seen WAY too many people show up in unlimited class long range events with 7mm Rem Mags and 300 Win Mags get their clocks cleaned by people shooting .308 match rifles. In hunting situations BC and SD are likewise nearly pointless to discuss for all shots on game inside of 300 yards. The ballisitic advantages are so sight at those distances its literally arguing about 1/4" windage advantages Who cares? Put simply--if you can't fetch your deer with a 7-08 it doubtful a Creedmore will do it for you either... LOL The 7-08 has a velocity advantage over the 6.5 because it has larger case capacity. Anyone who thinks the 6.5 is the only cartridge around that now has long high BC bullets available hasn't looked very hard lately. The old 7mm 168 gr Sierra Match King with a BC of .494 won a lot of long range matches back in the day. And its no slouch against any 6.5 bullet on the market today. Hornady makes a 7mm 162 grain ELD with a higher BC than the 143 6.5 and And the 7-08 can drive it at 2,700 fps....just as fast as the 143 grain 6.5 CM... So again....where's the advantage for the 6.5 if the 7-08 can drive a heavier higher BC bullet just as fast as the lighter CM? Maybe a recoil advantage....? In my 6.5 and .260 Remington with hunting bullets in the 120-130 gr range there's no need to fret about seating long VLD type bullets way out of the case to gain some space for powder. In any match rifle other than an AR10 style gun where you are limited to .308 size magazines there should be no real concern there either unless you are married to the idea that a 1/2" shorter action is required for your needs....use a long action and the magazine length is no longer a constraint. Or use a short action and the 6.5CM...and make the compromises work for you.. In short...there's no huge advantage either way. I would not sell my 7-08 to buy a 6.5CM or vice versa because there simply is not a huge advantage either way.