I think most of the big magnums being sold here are being replaced by Creedmoors since they kill just as well with half the recoil and twice the accuracy.
Partially true...The 6.5 CM has firmly established itself as an extremely accurate chambering without a doubt. I even own a couple. Twice as accurate compared to a magnum built by a tier one builder? That's not exactly accurate. Ask dudes who run a Ryan Pierce build, or a Accurate Ordnance, or a GAP, and on and on.
Straight 7mags, 7WSM, 28N that are mechanical feats of engineering will produce 1/2 MOA or even better. Same for .30 cals by same builders and alike.
Your statement doesn't carry the water, unless you meant a 6.5 CM coming out of a cardboard box will likely print better than a mass produced magnum. Chances are good you may be right on the accuracy part.
"Killing well" is subjective. Aside from dead is dead. You hit any thing in the eye, and it's drt...
Stoning an elk at 750 yards with one and done from a magnum versus hitting an elk with a 6.5 CM at same distance but elk runs 50-60-70 yards then piles up. They only common denominator is it's dead, but not killed better.
If the post was sarcasm...I'm Laffin... 6.5 Creedmoor, unicorns, rainbows and lots of pixie dust all go together, along with the 270 Win.