Hi all, had my first casting run with my brass Arsenal mold. Everything went well, great bullets but when I try to open the mold blocks after my casts they are a real pain in the rear to open. I have pre treated the mold (cycle to 350-400 degrees on a hot plate 4 times), made sure the spruce plate and pins were lubed. My lead is just over 3% tin (10lbs COWW and 2 1/2 lbs Foundry type alloy), I am running my lead around 720. Any suggestions would be appreciated to get them opened a bit easier. Thank you, Darrin.