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Old September 7, 2012, 04:18 AM   #12
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Join Date: August 25, 2008
Location: 1B ID
Posts: 7,952
Ruger's stainless barrels (on revolvers, in particular) are considered to be some of the hardest barrels around. Once they are broken in, they tend to have a great bore surface.

If the test loads were developed in something else (such as the 7.5" Blackhawk), it could help explain the disparity in velocities.
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