I recently bought 2 Lee 6 cavity molds: 429-240-2R, and TL452-230-2R.
The problem with them is the base of the boolits would have fins on them.
I returned them to Lee and got 2 new molds back, but they listed the problems as being a defective alignment pin on one, and the other was the sprue plate bolt by the notch was too long. But I never noticed these things as being issues.
So today I tested out one of the new replacement molds, and it does the same thing! I also noticed that the "fins" always are in the direction that the sprue plate opens.
Just to make sure I knew what I was doing, I took out an older 6 cavity .45 Lee mold. Perfect bases on this one
The biggest difference that I found is the molds that don't work well have very dull sprue plates. I don't know if this matters though.
Can I fix this or do I have to bother Pat at Lee again? thanks