Found max with H1000 in my short 6,5x284 and was suitably impressed! Almost same V0 as Norma factory 140gr gave in 26" before cutting. The load was a tad stiff, so will back off a little and land at something like 850 msec/ 2790 fps.
At first glance, I'm looking at 1/3 to 1/4 the V0...