I have a Lee 4 stage Turret Press and that came with the Lee Pro Auto Disk which leaks fine ball powders. The Auto Disk is garbage. I then looked at the Lee Auto Drum Powder Measure, but I got the impression it had similar issues so I kept looking and settled on the Lyman Brass Smith Powder Measure. It's easy to set up and it doesn't leak fine ball powders which I primarily use for pistol loads. I can dial in my charge in about 5 minutes and it works perfectly. No leaks whatsoever.
For extruded powders like H4895 or H4350 they get caught in the up or down stroke when charging a case because the kernels are too big. I still hand measure my large rifle loads, but at some point I'll move to an electronic digital powder scale and measure. Just need some more space on my bench.
https://www.midwayusa.com/product/1019622550?pid=443812https://www.midwayusa.com/product/1021173639?pid=112098
I have the RCBS version of that already. I’ll admit I haven’t even tried it.. I just knew that I didn’t want that second action when charging a case, I just wanted to upstroke and be charged. Didn’t want to crank a handle.
I will get a mount for it though and probably use it for some 30/30 or something. But my precision rifle loads I have a electronic dropper I use for them.