I have used Lyman 55s for years but Yendor does bring up a point. Fine ball does mess up most measures. Seems to be ok in the Chargemaster...and I do use the CM with larger rifle loads. It can be very precise but even the bench guys aren't sticklers for precise powder charges. When I load 296 however I actually use dippers yep the yellow ones...one of maybe 10 things Lee has ever made worth more than you pay(IMO). If it isn't cutting edge Magnum loads I use the Dillon meaure...but srill weigh one every 15.

Have to add. I have 2 Harrell powder measures and ball powders seem to workok in them