Back in the early 80s I got a ProMelt from a sympathetic girlfriend. I was deep into the IPSC game and commercial castors just did not exist. With 3 double cavity rcbs molds for a copy of the H&G 68 I cast bullets all winter from whatever I could find in the way of lead, mostly ww. I cast hot, and fast, frosting did not bother me, I only cooled the molds when the bullets fell apart or dented badly when they landed on the pile. Quantity was the name of the game. It took me 20 minutes to shoot 300 rounds of .45 in practice sessions. It was hard to keep up.
Anyway, now I am playing a different game with magnum loads and heavy wt bullets, mostly courtesy of mtnmolds. The bigger sprue holes make a difference, and I will open up the holes in my rcbs .44/250 and .45/255 KT molds. I just recieved my .444/300, .45/335 and .459/435 last friday, thanks Dan. My .44/285 works well from the Promelt as is, when the pot is full, more pressure spraying out the lead. I am going to try the ladle after opening up the hole and see how it goes for these bigger bullets, as per your advice Dan. I will try the bottom spout from the pot as well.
I like the Pro Melt, the temp control is near perfect, and I check it with my Brownells thermometer. I do like Marvelux as the best flux, and if you are a ladle dipper you have to scoop out the grey goo it dissolves into.
Looking forward to trying the new bullets, have to take my sizer to the cabin with me so I can shoot as soon as the bullets cool. All the brass is sized and primed. Putting a 20x Leupold on the .444 for the range testing. As long as the sun is shining and its not too windy it should be a good weekend.