I was lucky enough to get in on the group buy for the NOE 9.3 280 gr 4 cav mold. 3 are GC 1 PB. I thought I was going to have to give up on the mold . I did as the instructions said to do, which I always throw away instructions on anything. I'm so smart I can look at anything and figure it out. Well, when you spend your hard earned money on something you really want, no precaution is to much propblem. I scrubbed the mold. I use a hot plate, I had my metal perfect. I couldn't cast a boolit I'd use in a bean flip. 2nd time, did the same thing, worst results. 50% WW, 1.5" of tin from some tin bar stock, the rest was solder and pure lead. I got 5 worth keeping out of three hours. Let the mold cool over night empty. Tonight, used comet and a tooth brush, half of pot of WW, 5 lbs, 1 lee bar of antimony, then filled the pot with ingot from my other 2 sessions to make 10 lbs. The one thing I did different was to not use and extension cord as in the other 2 times. Got my metal hot about 8.5 to 9 on the Lee pot, not much better, but the last hole, which is the PB base was doing great so I kept at it. I also held the mold at a 45 drgree angle so as to let the air out faster and, Eureka! All 4 holes were droping perfet boolits! No wrinkles an frost just perfect. What a mold. The GC drop @ 278.2, the PB @ 281. What a mold, I cast 100 then had to stop my arm was getting tired! Here are some poor pictures, but you can see the results! Thanks Swede, can't wait for the Skinny 323471 later this year!