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Old August 20, 2018, 01:12 PM   #3
Junior member
Join Date: February 2, 2010
Posts: 6,846
"is the 10.3/5 much more concussive/loud than the 12.5?"

At the level of muzzle blast produced, I don't think there's a noticeable difference.

Considering the velocity lost to the short barrel, terminal performance should be about what a normal length barrel would produce at 300 yards.
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