back in the early 70's I bet between me and my best friend we loaded two or three thousand 357's using those dippers and a Lee hammer kit and never had any problem other than some singed fingers when seating primers a bit too deep
Like I said earlier I like the dippers with stick powder to get me in the ballpark, I finish the charge with a trickler and a scale. I will still use that method rather than haul my chargemaster to the range when loading on the fly.
Government is like a baby. An alimentary canal with a big appetite at one end and no sense of responsibility at the other. - Ronald Reagan