I have an RCBS. It's works pretty well. With fine powders like H414 it only varies by maybe .1 gn. With big stick powders Like 4350 it will vary by .3 grain or so. If I am working up loads I generally trickle each charge to get it exact.

Weedwacker
Indiana Predator Central

Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say there is more stupidity than hydrogen, and that is the basic building block of the universe.

Frank Zappa