Available as a rotary Separator or a Standard Separator, both fit conveniently on top of most 3 1/2 or 5 gallon buckets. Each have enough capacity to hold a case tumblers's worth of brass and media and the perforated bottom lets the media fall through, leaving clean brass behind.
When accuracy is the issue, all aspects of the cartridge case must be considered. Concentricity of the case neck is a prime consideration. Inconsistent neck wall thickness will cause the seated bullet to be misaligned with the bore. To measure neck thickness, you need a measuring tool designed specifically for this task. The Frankford Arsenal Case Neck Micrometer measures neck thickness to .0001".