I don't use an Autodisk anymore, but it is possible to adjust the powder throw to something other than the preset amounts. Find one of the holes that throws a charge just below the one you want to throw, then drill (or ream, or file) the hole a little bit bigger at a time until you get the exact powder throw that you want. The disks are cheap, so you could make a whole bunch of custom disks, just remember to mark the modified holes. I did this back in my budget days, don't have to worry about that anymore. I still have the Autodisk in it's original box, can't bring myself to sell it.

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Minimize the variables