With the sale on at MP I went ahead and bought a few very beautiful hollow base molds. Truly amazing to look at!
After a cleaning and several heat cycles in the oven I am finding it a challenge to get good results with the hollow base Webley mold. Using 20-1 alloy at 700-720° the hollows fill out nicely but wrinkles on the exterior. At 800° the outside looks pretty good but there's voids in the hollow base.
Similar issues with the shotgun slugs. Its not so bad with the 41LC maybe because of the thinner pins?
I've been preheating the mold to about 400° in a toaster oven and have a hotplate on the way to see if that works any better.
Anyone cracked the code for good results with these? They are pretty enough to put on the mantle but I really want to make some bullets that look just as good.