Not the exact powder you’re asking about, but here’s a .264 load that’s fairly close and that gives me great performance. 65.0 grains of Reloader 26, federal 215 primer, Barnes 127 grain LRX. I get 3,230 FPS and 3-shot groups of 0.335” out of my 26” Krieger barreled Model 70 with that load.
