Sorry to hear about your experience. I never have had to give up on Lee molds. They have always worked for me and I own more than a dozen of them.
Just was loading up the exact bullet that you mentioned. Cast in WW alloy, they are pretty much all perfect. That being said - there are a few that are "soft" on size. They look OK but when I go to seat them in a case, they are too small. There are not many - a couple or three out of a hundred.
All of them drop readily from the mold. I wonder about burrs...but you seem to have covered that detail.
How hot have you run the melt? I run mine at 750-800 deg.
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