Finally made it out to the range today with the 9.3x64 and the cronograph. At 15 degress, it was a cold finger day.

Brass was all RWS, primers all CCI 200, bullets all Nosler 286 grain partitions seated to the cannelure and 2 powders were used, RL15 and H-4350. Chrono was at 15 feet.

RL15 results:
65 grains, 5 shots, 3 readings 2449, 2483, 2439 fps.
66 grains, 5 shots, 3 readings 2510, 2517, 2537 fps.
66.5 grains, 5 shots, 4 readings 2560, 2521, 2587, 2567 fps.
Maybe a litte more room here.

H-4350 results:
67 grains, 3 shots, 2 readings 2366, 2372 fps. Low recoil - should probably have started higher.
68 grains, 3 shots, 1 reading 2403 fps.
69 grains, 3 shots, 1 reading 2463 fps.
70 grains, 3 shots, no readings but likely about 2500 fps.
Room for a little more here.

No pressure signs with any load.

redleg

Max load with noslers 286grs, is 77grs of norma 204, and federal 215 primers. velocity is 820m/s. OAL is 91mm.
215 primers give better accuracy with this heavily compressed load, and nearly 100fps more velocity. pressure is fine, could have used another grain or two if I did not run out of space.