Thanks for your reply, Wayne. 
Lee Gibbs pres.ASSRA

4570mike wrote on Jun 17^th, 2021 at 2:10pm:


Mike,

When casting handgun bullets using a bottom pour pot I've had the same experienced now and then.  Reducing the pour rate solves the problem.  Even with dip casting or making a chamber cast, if the alloy is poured too fast, many time the bullet or casting will not fully fill out.  I don't believe it's an air escape problem but cause by turbulence due the fast pour as the alloy quickly cools.

Wayne

I was casting three different sizes yesterday. When I began, the pot had about 12 lbs. in it. The first were 370 gr. 38’s. Cast about a hundred and many didn’t make consistent weight (+/- 0.5 gr).  A 210 gr. .32 cal. Was next and these came out with fewer rejections. Last were 355 gr. .40 cal slugs. There was a bit more than one inch depth of melt in the pot. These had very few rejections out of the hundred + cast.
I found the mold does not have to be up tight with the spout. I keep the sprew plate about 1/8” below. However, I always let the melt drop directly into the sprew hole and not touch anything else. I leave a generous “blob” on the top.
This and a very hot sprew plate seem to contribute to very consistent slugs. I do a visual while casting. All are weighed (and viewed again). 
I judge a good casting session based on the number of rejections and it looks like I’ll be doing more within a “short” pot 
Mike.

Thanks to all of those who helped me to be able to cast Ladle poured bullets. 
Prior to and not being able to figure it out on my own and to say the least none of them / ladle poured bullets were not even worth trying to take and to try and shoot on a competitive level. Thanks to Fitz Old Tuck on this site and Charlie Dell and Barry Darr. I eventually learned and it was not an easy hands on learning experience at that time by any means.