Over the past few days loaded up a thousand rounds of 9mm 124gr on my slow Lee turret press.
Noticed something weird that I hadn't seen before... I'm using the Lee drum powder measure. It has been 100% rock solid. I dialed it in a few years ago for 5.3gr of CFE pistol powder, and every single time I start loading again, I check a few, and without any adjustment, it's always rock solid 5.3gr. Last night I finished up a bottle of powder, so pulled out a new bottle, exact same stuff, purchased around the same timeframe as the last bottle. With the new can, I was getting 5.4-5.5gr per throw. So it seems like for some reason the powder in the new bottle is slightly denser than the previous bottle. A small adjustment, and it's back to 5.3 every time, no variation over the last 500-600 rounds.