Sorry eastex, I am using the Hornady Lock-N-Load? Auto Charge? Powder Dispenser which allows you to change the trickle speed and I thought I remembered the RCBS able to do the same but according to the manual there is no option to change that. What about entering your charge weight to within say 1-2 grains and then using the manual trickle function to get your weight exact. A little bit of a pain but would be very accurate. Also both these scales state to plug them inand let them warm up for at least 10-15 minutes before starting to reload. Hope any of this helps.