I've had success this summer with N160 and 123 gr A-Max in competition, and recently had some success with N165 and 140 A-Max on a training day with Bradley Bourner. I've had some chrono issues, but this load seemed to be about the 2725 fps mark and hopefully I will get a chance to verify this over the holidays.
I've also used RL-19 and H4350. I use 129gr SP with N165, but probably should revisit this load and try N160. I've a plan to try H4831SC with 140 A-Max again. I've also a plan to try some 123 gr Scenars.
Given my 260 Rem is custom throated for me, and has a Wyatt's Extended Box Magazine, I'm not sharing actual powder charges. I'm currently using Nosler (mostly) and Lapua brass. The rifle spec is in my Gallery.
Regards
JCS