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The auto disk doesn't have the same elastomer wiper system as the 'Perfect" Powder Measure. I use the auto disk measures for almost all of my handgun loading. Small grained powders such as Bullseye, PB, 4756, 2400, Power Pistol etc, meter a bit more consistently than Red Dot ,Unique and other bulky flake powders....... but consistent operation of the press generally lets the bulky flake powders drop within one tenth of a grain.....which is adequate consistency for those types of powder.
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