After waiting what seemed like month, I finally got notification that MP Molds had the 452374 slick-sided mold Id been wanting in .452”. So with only 11 in-stock, I placed an order and had he had it to my door in 3-days—amazing. This 6-cavity aluminum mold arrived looking as fantastic as the other 5 molds I have from MP. As standard procedure, I cleaned with dishsoap and a soft toothbrush to remove any machining oils, and then heat cycled 3 times. Started casting and the bullets started dropping out of the cavities as soon as I started to release pressure on the handles. I use primarily COWW alloy, and for my other molds typically drop the advertised diameter but typically a couple grains over. Like my HG#275 clone from MP cast .358” and 137gr. So I was shocked to find that the 452374 was dropping .454” and weighing 239gr. The mold works well, and bullets look great, but just disappointed they don’t drop the diameter that I had specifically ordered. I did contact MP and Miha did respond back promptly that it was still good to use, and to use 230gr load data. So hopefully, they will still shoot well.
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