The 9.25" twist does just fine with 105amax so I assume the 103eldx is not much different.

Several years ago I worked up a load in the winter for a mod-11 in 243win with the 9.25" twist... Starting loads were in the low 2,500 fps range and shot very good. The only other 105grainer I shot in the 9.25" twist was the Hornady BTHP, and it also shot nicely.
I'm shooting at 660' ALS (200 meters).