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Old February 5, 2013, 11:05 AM   #14
Senior Member
Join Date: November 2, 2007
Location: Northern Orygun
Posts: 4,923
When you dimple a barrel, you change the local stress state which can lead to accuracy issues and some irregular heat flow. Inspection of barrel interiors, especially chrome lined, has revealled that in some cases, the first point of failure and cracking of the chrome lining occurs at the point of the exterior dimpling. More often, it is at the gas port though.
With the number of gorillas working on guns these days I guess anything is possible. Drill the dimple too deep and crank down on the set screws, even drunk monkeys need work.
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