Something I don't get about the Creedmoor or maybe I've just read thing's wrong. Happened once before! They claim the case is a bit shorter allowing the bullet to be seated out farther than the 260? If I understand that right, it's bunk. It's not the case that determine's how far out a bullet can be seated, it's the distance to the lands and the magazine length. I have though this Creedmoor was a bunch of hocus pocus from the start. Doesn't mean it's not a good cartridge just that it was stuck in to do the same exact thing as the 260 when properly advertised! Know what I think would be great for handloader's? An action just a bit longer than the one used now for 308 length cartridges. Then the magazine wouldn't get in the way of seating a bullet out farther!
Like say the length of a military Mauser Action?
Yes, but the shorter 6.5 Creedmoor case allows for longer/heavier VLD bullets to fit and cycle through the typical 2.82" to 2.89" short action magazine boxes. The 260's case is 0.115" longer, 2.035" vs. 1.920", not much, but enough to make a different with those longer/heavier VLD bullets that are popular today, but weren't when the 260 was introduced in 1997.
I shoot the same 130 grain ABs in a 22" 260 and a 22" 6.5 Creedmoor and don't see any difference that couldn't be explained by the variation in barrels. Two peas in a pod for hunting purposes out to a quarter mile.
Subjectively speaking, the 6.5 Creedmoor has at least four advantages over the 260:
1. Lots of different rifles chambered for it, including several low priced entry level rifles.
2. Lots of different factory ammo options, all of it accurate, and some that can be found on the shelf at Wal-Mart.
3. The shorter case is an advantage when shooting longer VLD bullets.
4. Rifles come with a quick enough ROT for shooting longer VLD bullets accurately.
Remember that I'm a fan of the 260, have been shooting them since before factory ammo was widely available, but I can appreciate the differences between the 260 and 6.5 Creedmoor despite the fact that those differences are neither an advantage nor a disadvantage to me because I'm not loading or shooting those longer VDL bullets in my 6.5 Creedmoors.
EDIT: This reply was intended to DonFischer, not for Seafire.