Mike, you know how to ring'em out. Getting 3034 from a 125gr Partition, from such a small cartridge and a 22" barrel ? I say this, only because a 24" test barrel only produced 2876 for Hodgdon. The fastest load on Ammoguide, listed with a 24" barrel and a 120gr bullet is 2986, 2799 for a 130.
Edit: I found where it came from. The 6th Edition Nosler manual lists the 125gr Partition, with 48gr of N560 (112% case capacity), moving at 3034. But that was a 24" barrel also. If you got that from your 22", good job Mikey ! I know how much you love your load work. By the way, Norma MRP is just RL22. Seems a bit on the slow side for a .260, but you have been at this longer than I.