RE: Casting Temperatures......................
It does take longer to warm up the steel mold, but once you get her warmed up-look out. The aluminum molds are the opposite. They get too hot too fast. Aluminum molds are fine if you do not cast a lot. The stell mold's will last forever if you take care of them.
I do not know why but you get what you pay for in molds. I have a couple of RCBS molds, and they are unbelievabe in the way they cast bullets.Tom.