I was wrong, it's usually between 8 and 8.5. I keep thinking the top setting is 10, but it only goes to 9!
I just received an aluminum 2 cavity Accurate 36-190T mold, for casting heavy bullet .38 S&W loads. Took it out to the garage today, preheated it on the hotplate with the Lee pot on 8.5. Cast 50 bullets, every one perfect. (Frosted though, I like frosted) Ambient temp 32 f, snow on the ground. They all dropped .362 across the driving bands.
I have a Lyman thermometer, the temp was, believe it or not, 850.