My 140 and 147 ELD-M data will be real close to the ELD-X data. In the Hornady data, it's the same, but verify (per projo weight, it's the same). This load info is shot through a Wilson Combat 20" .260 Remington Tactical Hunter barrel, 1:8" twist. My 147 data came from Hornady, my 140 data came from Sierra. I'm using the Hornady 140s, though, with the Sierra data. Both 140 and 147 data is hard to find, because those projos are so new.
On 140 ELD-M in the .260 Rem, I'm running 35.0 grains of AA-2495, 2.785" COL. On the 147 ELD-M, I'm running 43.0 grains of RL-22, same COL. Big difference in the charges between the two,but RL-22 is a slower burning Magnum powder, and AA-2495 is more of a match .308 powder. Took me quite awhile to come up with them, through several OCW ladders, but those are the ones.
I have a hybrid 5.7oz shorty 2.500" buffer in there. The 140 load won't lock back with that buffer in there. To run the 140 load, I have to switch out to the 5.15oz shorty buffer.
Start LOWER than what I told you. LOWER. .260 Rem has a very small amount more case capacity than 6.5 Creed. My STARTING load on the 140s was 34.9gr, and I went up. There were serious pressure signs with everything higher, and I pulled a bunch without shooting them. I pierced a couple primers when I was in the mid and high 35gr loads. I pulled everything else as soon as I saw that.
***Load data over the internet is on you. If you blow yourself up, it's YOUR issue, not anybody else's issue...
^^^Just thought that needed to be said.