My .390 and .395 molds are Lee and my .440 and .662 are Lyman. As for round ball casting the Lees are good enough, but I can see that the ball is not as spherically true as they are out of a Lyman. It hasn't seemed to effect them however. With the Lee there is also less sprue on the ball, on my .390 there is only a very small flat spot. To reduce the sprue on any mold, all you would have to do is remove the cutter and mill a few thousandths off the top and replace the sprue cutter. I'd have to give the nod to the Lymans for quality of the ball, but they take longer to heat.
As for Minie Ball molds, I much prefer the Lyman or Ideal molds. They're much more durable and retain heat better. The drawback is having to use the separate base cavity plug versus having it built into the Lee. I have a 505 gr. Lee Minie and a 485 gr. OS Lyman as well as a 685 gr. OS Ideal.
The Lees are more affordable and light weight if hand fatigue is a factor. If you shop around and get what mold blocks you need in the Lyman, you can save a lot of money by getting all of them in one handle size (large or small) and you only have to have one set of handles for them. All you have to do is swap out when changing to another size, unless you are one who likes to keep 2 or more molds busy at the same time.
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