Point of aim for all shots was the center of the orange dot. I was shooting off front and rear bags (filled with rice)
Scope is a Nikon Prostaff 3-9x40 with BDC.
Today was a sunny day and it was easy to see the target dot at 200 yards at 9x and the Crosshairs don't cover up all the orange.
Caveat: the scope does not have an adjustable objective lens and parallax is factory set for 100 yards. I could see that there were parallax errors at 200 yards, and tried hard to get a consistent cheek weld/sight picture for each shot.

Velocities (FPS) were as follows (admittedly, not always consistent and a second ladder test will take out some of the error)
50.0g=2188
50.5g=2226
51.0g=2241
51.5g=2305
52.0g=2303
52.5g=2320
53.0g=2387
53.5g=2379
54.0g=2376
54.5g=3023(??)
55.0g=2390
55.5g=2834(??)
56.0g=2415

I'm not really worried yet where they fall on the paper relative to the aimpoint. That can be adjusted easily enough later.

I'll do another ladder when I can, and I'm thinking that the 50.0-51.0 (average velocity is 2218fps) may be one accuracy node and the 52.0 and 52.5 (average velocity=2311.5) is another node. The only problem with that is the 51.5g velocity was 2305 and it was almost 2 inches below the 52.0g and 52.5g bullet holes.

Also, I do have other powders to try as well.