I have several Lee molds (round ball) and they've been fine except for the dud I bought a while ago. Lee were no help and weren't interested in me, so my next order with Titan I bought a replacement which works fine (it would have cost me more to send it back to Lee than buy the replacement!!). Having just taken up cartridge reloading, I bought a couple more molds from Titan and thought I'd better try them out today.
First one is a .358 semi-wadcutter (two cavity). The boolits were coming out with wrinkle lines, so I figured I'd keep going as maybe the mold needed "breaking in" - 100 later and no better. Hmmm, got out the other mold (.429 round flat nose) and tried that. The first few were a bit iffy, but then it settled down to making nice boolits. Ok, it's not the melt or the temp.
I had a close look at the mold under a magnifier and could see little flat bits of metal that had been folded flat along the face of the mold at the edges of the cutouts! WTH? I carefully filed them off with a small flat file and tried again. Better, but still a couple of wrinkles appearing even though I can't see anything wrong anywhere.
I'll try the Lee-menting process with some very fine polish, but if that doesn't work I'll just have to put up with it. After my last little effort with Lee I have no intention of wasting time contacting them, as they just don't care. I have quite a bit of Lee gear for reloading, including a new press, an old Pro1000 and various dies and bits and pieces. Some has needed a bit of work, but that's no big deal as the quality is generally pretty good - BUT NOT SO THEIR MOLDS! I have had a 20% failure rate!
Doesn't say much for their Quality Control.