I've only been using my ChargeMaster for 5 years and love it. It diespenses while I am seating a bullet and cycling my 1050.
Just remember, unless it is an old analytic balance (with no damping), no matter how careful you think you are, it is still ±0.1gn.
For those with ChargeMasters, the worst error I have ever had was a display weight 0.1gn over the target. I simply touch the powder in the pan with my finger and pick up a few kernels. Almost always, it is then at the "correct" display weight. If you take out slightly too much, hit the "trickle" button once or twice. If you take out way too much, simply hit the "dispense" button again.