What exactly does a 260 Remington do that a 6.5 Creedmoor won’t, except not accommodate long 6.5 bullet loads in a std 2.825” short action (SA).

That’s the reason Hornady picked up the 6.5mm and redefined it as a properly designed 6.5mm with 8 twist and a usable COAL without the seating and load complications for the average hunter or target user. Lapua also knew well and good that to operate high BC heavy bullets in a true SA with 6.5mm loads you’d need a reduced case length and their 6.5x47 was developed to do just that.

On another note, Remington never supports their cartridges very well. They threw in the towel on so many cartridges that carry the Remington name it’s hard to keep track. In fairness the 260 Remington development had little to do with Remington and more to do with the work of Jim Carmichael who developed it as the 6.5 Panther in the early 80s. In another twist Art Alphin of A-Square submitted SAAMI specs and drawings well before Remington did on the cartridge as the 6.5-08 A-Square. Somehow Big Green got the glory due to industry clout and the 260 Remington was born. It’s a great cartridge, it just has some COAL quirks when using full potential length 6.5mm projectiles. It does nothing in the field a 6.5 Creedmoor, 6.5x55SE, 6.5x47 Lapua, or 6.5-06 won’t do using a 0.473” bolt on a std SA or LA.