I've been reloading for about six months, using a Lee Classic Cast single-stage and Lee AutoDisk powder dispenser. Loading for 9mm and .45ACP, I recently finished my first pound of Bullseye and bought a second. I had been using the 0.43cc cavity of the AutoDisk to drop 3.9 to 4.0 grains. With the second bottle of Bullseye, this same cavity is throwing only 3.7 to 3.8 grains; I had to move up to the 0.46cc cavity to get 4.0 grains. Is it possible that the density of Bullseye could change by 5 to 10 percent between lots? I've taken the AutoDisk apart a couple times and found no problems or obstructions. I thought maybe it was a static problem (Colorado air is pretty dry this time of year), so I wiped all the parts with a dryer sheet, but nothing changed.
I know that Bullseye has been in production for decades, so it seems unlikely that it would change from lot to lot. Should I be looking elsewhere for a explanation?
I know that Bullseye has been in production for decades, so it seems unlikely that it would change from lot to lot. Should I be looking elsewhere for a explanation?