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green mountain 10/22 bull barrel - 16"/18"/20"?
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March 3, 2013, 04:50 PM
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Pahoo
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Join Date: February 16, 2006
Location: IOWA
Posts: 8,783
16-18-20; You call !!
From what I have read, max velocity is acheived at 20" and the longer you go, the velocity drops off. So, as long as you stay at 20 or below, you should be okay. ...
Reference page 200 of the NRA Firearms Facts book (3rd. addition)
Be Safe !!!
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