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Old December 29, 2008, 10:11 PM   #10
Shoney
Senior Member
 
Join Date: February 21, 2002
Location: Transplanted from Montana
Posts: 2,311
When using a powder measure, you will deal with three types of powders. Extruded (ex. IMR3031), Ball/Spherical (H335), and Flake (Unique).

With ball your charges should be almost always the same, with flake, you get bridging of the flakes and can get widely varying charges if you are not careful. Extruded powders are very hard to throw with any accuracy and should be weighed every time.

If you want to use the full potential of the progressive, you must be using ball powders or some of the partially flattened Shpherical powders (Univeral is one).
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