This is something I have wanted to do and watching Chapys video of his R77 rifle. I made a video along with some useful information about rifling twists. cwlongshot
This will show you how to vent the top of a bullet mold for better base fill out. Older molds did not have any venting for the sprue plates. It’s helpful!! Here is how I fix that. cwlongshot
I have a loaner RCBS 1500 Electronic powder drop shipping to me. Johnny1982 gave me this Lyman and I like it a lot as I do not trust electronic scales. At least not explicitly. cwlongshot