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Old September 6, 2012, 08:34 AM   #5
Senior Member
Join Date: August 1, 2010
Location: Tampa Bay
Posts: 4,371
I had a 188 series Mini- it was one with a 1 in 7 twist barrel, there was a short period when Ruger changed the Mini to that twist...
Check your SN online at the Ruger site. You can shoot heavier bullets with the 7 twist barrel.
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