OK amigo.....glad you are still ok !
I am unconvinced over linotype vs gildingmetal projectile question -as regards pressures. I would think they would be nearly /practically equivalent for similar lower velocities, if diameter was the same, [often lead is +2thou oversized for accuracy in target loads].
Maybe NB also consider staying away from fluorescent lights(gives inaccurate readings with any chrono) and use a new longlife battery too!
The capacity of a case also affects pressure. Weigh water in case on a bullet/powder scale and then compare against a standard brass (-not cadmium plated) case maybe.