I use 41.5 gr of H 4350, WIN primers, Hornady brass and 140 ELD-M. 2830 FPS in my 26" barreled LRP and the same load is 2705 FPS in my 24" barreled 10T.
I use the same load with 143's at just slightly slower speeds.
My brother uses Peterson Brass, 43grains of RL 16 and 140 ELD-m at 2900+ in his Tenacity action (not sure of the barrel).