The only true way to know is by velocity. Chrono the loads and adjust accordingly. Load data is a GUIDE designed to get you close. It's impossible to replicate lab results in the field. Decide on a how fast you want them, study the data and build some loads. Then, shoot them from YOUR gun and check the velocity! YMMV
ASE Master Tech, Armorer.
"We need to save the planet from Liberals, not from incandescent light bulbs" - Kurt Larson