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Old 09-20-2010, 07:29 AM
mak91 mak91 is offline
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Join Date: Oct 2009
Posts: 63
I've only shot these barrels off hand so I really can't say what kind of groups the shorter barrel can do yet. The powders that I've used have ranged in burn rates between 56 - (blue dot) and 69 - (sr4759). The 7 inch barrel has the gas port moved back 1.5 inches for reliable cycling.
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