For subsonic I wanted a 100% burn and subsonic velocity for a suppressor using the RMR 147gr Flat Nose bullet. I chose VV N320 for that. 3.5gr and COAL at 1.110 inches. In a Sig P226, 4.4 inch barrel the unsuppressed velocity was 902 fps, measured by Labradar. It shoots well. QuickLoad predicts or calculates 100% burn and 951 fps.

VV N330 takes more powder and yields a little higher velocity but still burns 100% according to QuickLoad. 4.1 would be a pretty hot load but still quite doable from the looks of it.

I guess it depends on what you want to do.