I have had a RCBS 1500 for a couple of years now and won't be without it. If you do a search here and on other sites you will find many who swear by it. I consider it more accurate than my beam scale and more dependable. For awhile I kept my beam scale and checked the 1500 and if there was ever a difference it was the beam scale that needed to be adjusted.
The 1500 comes with 2 of the 50 gr calibration weights and I calibrate it when I start it everytime. After calibration I put the empty pan on the scale and it
always measures 155.0 gr. After rezeroing with the pan on the scale and dispensing a charge, when I lift the pan to funnel the powder into the case, the scale
always reads -155.0 gr.
You have to realize that the 1500 is a highly accurate powder
thrower. By that I mean that because of the mechanics of the rotating powder dispensing tube, there can be a few too many granules of powder fall off on the last turn. So I set the dispenser to throw a little less and then bump a few granules off to get the exact weight I want.
Calibration
Rezeroing
In this example I want to dispense 60 gr RL22 so I set the dispenser on 59.7 gr
After the 1500 finishes dispensing and beeps,
wait 5 seconds and the machine will show the actual amount dispensed, in this case 59.9 gr
It is then a simple matter to dislodge a few granules off the end of the tube to get the exact weight
Emptying is a breeze, just move the scale to the edge of the bench, open the drain and drain into the bottle
Hit the dispense button and it will empty the tube
If the dispenser slows down, just hit the cancel button, empty the pan and then hit the dispense button again. Unlike the powder thrower I used to use, I never spill a granule of powder anymore.
The 1500 will speed up your reloading because you can set your block of cases up and while the 1500 is dispensing the next charge into the pan, you can have your seater set up and seat a bullet in the previously charged case. When you are finished dispensing and charging your cases you are all but finished with the seating also.
The 1500 is also indispensable for weight sorting cases and bullets or just measuring many things that would take way too much time with a beam scale.
Love my RCBS 1500!