I'm using ADI powder AP 70. Which rotor should I get to throw 4.5 grains of this powder? The RCBS charts don't list ADI powders.
thanks in advance
rob

You need to try rotors and weigh the charges that they throw with the powder. Even the powder/rotor combination on the chart needs to be weighed to assure that the rotor is actually throwing the chart weight. I use a Little Dandy for working small volumes of pistol cartridges, and my experience is that the chart is close, but not close enough, particularly with flake type powders.

Wish I had a better answer for you.

Only a comment, but wondering how difficult it would be to take a single steel rotor body & configure a adjustable cavity insert (or something on that order) that would adjust for different volumes. Everything scale checked of course like my Pact BBK. Individual rotors are around $10, I have most of them but maybe for your application, Lee makes a PM as well with a series of rotors that you might experiment with. r in s.

I have one with a half dozen rotors that has not been used in years. Is it worth selling?

I'd be happy to purchase, but my zip code is Australia.
rob

quote:

Originally posted by robz:
I'm using ADI powder AP 70. Which rotor should I get to throw 4.5 grains of this powder? The RCBS charts don't list ADI powders.
thanks in advance
rob

Check the Lee dipper chart if you have one and then cross check to the RCBS chart.

If there is a version on the Lee dipper chart I can look it up for you. It will get you to the closest rotor right off.
PM me if you want.

If you make an educated guess to get close in volume you can make it work easily. Drill out the botton of the cavity for a little more volume or add a drop or drops of epoxy to take up a little volume. OR, if you don't want that permanency, go larger and use sticky NRA alox/wax lube melted and dripped in a larger cavity to suit. It won't fall out like candle wax. Powder the sticky with a bit of graphite or mica powder before using. This is great for .223 loads. I stamp the rotor after I make permanent alterations.