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Old August 16, 2021, 01:09 AM   #2
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Join Date: March 20, 2011
Location: Willamina, OR
Posts: 1,804
For what it's worth and this is far from scientific, but the few rifles I have with shallow micro-groove style rifling seem to shoot just as good as my other rifles with deeper rifling grooves. I suspect it would make more of a difference with softer cast bullets...

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