Like Don - I plugged my 20 pound Lee pot many years ago and dip with an old style Lyman ladle - without the huge casting flanges the RCBS ladles have on them - pain in the butt.
My current 20 pound is my third Lee pot - wore out 2 ten pounders and one used heavy 20 pound Saeco pot (simlar to Lyman) and now have been running this Lee 20 pounder for about 10 - years - .45 &.50 slugs plus all my round balls since just before my back operation. I don't cast and shoot as much as I used to, due to not shooting ipsc any more.
I'm finding more uniform results especially in bullets, from dipping - pretty much always have. For a time, I defended bottom pours, but with bullets & round balls weighing 400 to 600gr., the dip is the only way to have just about every bullet or ball cast in a session, perfect by weight and measure. I've gotten to the point, I don't even weigh or measure than any more.