Folks,
I have sold over a dozen of these things and just recently had 2 of them come back after some use by good shooters I know.
I stand behind my work, so, here is some things that will give you REALLY good results in the future.
1) These are single cavity Lee molds, and as such, they suffer from inadequate gas vents. All future modified molds from me will have "enhanced" vents. (I simply take a carbide scribe and open up a dozen of these vents going away from the cavities on each half of the mold )
2) USE MOLD RELEASE STUFF!!! match smoke is not good enough for 30:1 alloy... Use the stuff from Foresterl.
3) Pour in the alloy SLOWLY... I can't stresss this enough.
4) A clean mold is a happy mold. (it even says to clean the molds in the instructions I provide as part of the Lee kit)
Do these steps and you should have a mold block that will last you YEARS and THOUSANDS of bullets.
I still have 2 mold blocks for folks looking for some.
Take care!!!