They do because of the radius and drag. More ammo manufacturers are starting to come out with higher bc for 28.
Lol apples to apples and apples to oranges. There all boom sticks with projectiles.
On all my hand loads my in the .264 140grn round the creed is the slowest, 6.5 x284 300-400 fps faster than creed 264 win mag 400-500 fps faster than 6.5x284.
It would be easy to say the 264 win mag out performs most rifles out there but I wouldn't do that because it's not always my go to.
I have two 6.5 x284 that both use different powders to get the same velocity. One retumbo and the other h1000.
I have found most manufactured bullets get 200 to 300 fps slower than actually advertise even in my 26-28 in barrels. I also noticed 20-even 50 fps between shots out of the same box with total barrel cool down. 6.5 300 wetherby ammo from wetherby was the worse.
Any caliber has its sweet spot especially in the 6.5 or .264 what ever you want to go by, when the velocity of the smaller caliber will have more energy at a paticular range than a bigger heavier caliber. I think it's funny when someone post my 6.5 will beat your 270 at 500 yards.
My 264 win mag 140 grn has as much energy as my 300 win mag with a 180 grn at 800 yards. Is it better or as good as my 300?
If your going off of the ballistics released off the bullet manufacturer website or what's on the box stick to 600 yards or less. If your shooting over 600, you better have a decent chrono and good dope for elevation, temp and shot placement.
It's a mute argument and the only reason I read these post is for entertainment.