When I see big changes in velocity when changing lots of powder, I see much smaller changes in volume than in weight.
Do you have anything to add about that, Denton?
I do too....
While unscientific, in one cartridge in particular, I use the same volumetric setting on the 3 BR Redding measure (stick powder) going from lot to lot and the load has always been within 25 fps. of the last lot.
Granted, its a load with 100% density, slow for the cartridge and the cases are on par for capacity. I've done that the last 12 pounds that span over 7 years production time.
Just a sample of one. There are only two cartridges I know/remember where the settings are and the other is a handgun round.
