I have suspected that my RCBS 5-0-5 has been inconsistently weighing powder charges. It seems that almost everytime I reverify a load, I get a different velocity from the time before with varying accuracy. This has been going on for years. I am selling the balance to a friend who is just starting out and aware of the issue. Before I buy, is there a balance that is a little higher quality that will deliver more consistent results? Thanks.