If you're an inexperienced caster, I would stay away from hp molds until you have really got conventional mold casting down pat. HP's are very critical for mold temp and cadence and they can drive you nuts until you figure out how the mold needs to be run. You can literally cast 100's and you'll be scrapping most of them for incomplete fillout. I also find that when you run the flatpoint pins they are difficult to cast as the bullets end up getting hung up and don't drop free. So the theory of having a mold that drops both hp's and fp's is great, in practice I find I only cast hp's from my hp molds and have dedicated fp molds when I want a fp.
Spot on. And a lot of where my comment of "adding time to the process" for me came from. Too cold--improper fill out, too hot--I get chunks of the HP cavity torn off because the lead hasn't frozen enough to support its self when falling from the pin. Takes a bit more practice to get the cadence right.
