I find Bullseye to be one of the more consistant powders to measure with both a Uniflow and a Lee Pro Auto Disc.The Lyman measure should do the same. Once set I've never had a meaure to change charges during a loading session. I'm not saying it can't but it's not happened to ME. I also have both a RCBS Rangemaster 750 digital and a RCBS 502 beam scales. I have on occassion caught the digital creeping up during loading sessions. There are some things that will interfere with a digital. FOR MY 750, I have to let it warm up good before calibrating it, and keep it well away from florescent light fixtures and it stays dead on.
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