Remington sucks - their marketing sucks, the R&D sucks, they have no idea what long range hunters/shooters want or need. Thats why none of their 260 offerings came with a twist rate fast enough to stabilize the high BC 6.5 bullets.
Edit: to sum it all up they are idiots and they suck. The 6.5 creedmoor never would have been necessary if Remington hadn't screwed the pooch on the 260.
Remington brought out the 260 long before the long range hunting became popular. It was originally brought to market when everyone was shooting their animals at 100-300 yards, with a 270 Winchester. It was the short-action option to sell more Model 7's.
The silhouette shooting crowd picked it up for their sport, and found that when long VLD bullets were seated to fit the short magazines, they ended up with the ogives inside the case neck - which wasn't good. So, it was shortened a little bit by wildcatters, to get the case mouth in the right spot for this application. This, and a few other factors, were the set-up for the Creedmoor.
Remington could have done this, but they figured that they had bigger fish to fry with their then-new line of beltless magnum and short magnum cartridges, so Hornady picked up the ball. Their marketing team was paying attention to what the long-range crowd was doing, and steered the engineering team in a direction that gave us all the new stuff we see written about on this forum.
It seems to me that Remington was focusing on where they thought they'd find a larger market, and they probably wish that they'd gone the other way on that one. Their work with those big cartridge cases has given the wildcatters some material to work with, and the long-range shooters are cashing in on that, too. Years ago, though, it was the other way around - the wildcatters gave Remington the 25-06, 22-250, 35 Whelen, etc. We'll see how it goes for them now that they have stopped listening to the market, and are trying to dictate to the market. They are falling further behind, and Hornady has become the leader in the long-range shooting industry. Remington is still trying to be everything to everybody, rather than picking a specialty like Hornady has done. Being part of a big conglomerate of sporting companies probably makes it somewhat unlikely that they will pick a specialty and run with it.