I've tried casting with the new Lee 300 Blackout boolit mold a few times with poor results. Been using a 50/50 mix of clip-on and sticky ww. First thing I ever did was to use a new razor blade and very carefully remove some machining burrs on the blocks,then smoked it with matches. Then cast some-no good results. Second thing I did was Lee-ment the mold. Cast some-no good results. Third thing was to re-smoke it then use scotch-bright to very carefully clean the carbon out of the vent lines area. Cast some-better results. Forth thing was to just try different angles and what-not while crossing my fingers. Bingo!!! I have molds that require the flow to drop straight down to the bottom to get good fill out, and some molds that don't care how I pour the lead. But this mold needs the flow to hit the spur plate and swirle a little to get the base to fill out nice. Hope this helps someone else with theirs.

Shaune