It is 360 125T the only reason this mold is not brass is because I did not pay for it. Technically it belongs to my boss, He buys the stuff and I load the stuff and get to keep 50% of what I load, and he buys the lead as well.

It seems to me that once the brass mold is up to temp, it holds the temp a little more constantly. The down side is the weight. But they make awesome bullets and are easy to work with, so for me I prefer brass.