.01 grain ----- ONE HUNDRETH OF A GRAIN !?! That is One 700,000ths of a lb. Just over 1/2 milligram.
For reloading, I think +/- one tenth is as tight as you would ever need. An RCBS 505 will definately get you good readings for +/- one tenth of a grain, even a 502 will. The trick is, at that level even your breath will offset the balance, so you have to protect it from air movement. A simple box over the back, sides, and top will greatly isolate air currents and make it less frustrating to read.
I have worked on a balance that could easily do 1/2 a milligram. It was in a standards lab. It had its own limestone foundation that was 10 feet into the ground seperated from the buildings foundation and floor by an elastomer ring at least a foot thick and had a cabinet around the system where oxygen was evacuated and the sample hung in purified instrument nitrogen. Probably outside of most peoples reloading budget.
I'm looking for a scale that is accurate and with a resolution of .01 gr. Tried a Dillon and it would drift after 3 or 4 cycles!
A Precision Beam Scale at an Affordable Price Pro 500 Scales offers precision accuracy on a high impact styrene base. Features extra large leveling wheel, dual agate bearings and large dampener. Zeros in seconds. Accurate to 1/10 grain. 500 grain capacity. WEIGHT: 1 lb |