Ok,
I'll be the first to admit I haven't cast a lot of rifle boolits. But I've never had a problem till yesterday.
I got the Lee .30 cal 230 gr boolit mold for the .300 BO.
I cleaned up the mold, it's free of any grease or oil. I went out to cast some yesterday and must have cast 300 with the bottom pour. Never got a usable boolit. They all have swirls in them. I switch to a ladle and now I'm getting about 70% usable boolits.
I tried temps from 700° to 800°, the mold is smoking hot. I can cast with the ladle and get two good boolits, try the bottom pour and swirls.
It's obvious that the lead seems to be splashing and cooling when using the bottom pour. I really need to use the bottom pour because the only way I can ladle pour is to stand up and that doesn't help my back at all.
Any ideas?