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Old January 12, 2013, 08:24 PM   #21
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Join Date: December 14, 2004
Location: Maine
Posts: 3,138
Variations in powder charge must be great to affect barrel harmonics and may result in much lower velocity for most people's likes. Seating depth doesn't affect muzzle velocity to an appreciable extent, yet changes barrel vibration, hence is favored by many.
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