I thought I would post some pictures of a test I did on 2 stainless barrels they are both from the same lot the only difference is that one has been painted black.
in this test I measured the deflection of a stock barrel against a dimpled barrel using 50 pounds of weight hanging from each barrel in a cantilevered barrel fixture that simulates the barrel in a upper receiver
sorry the scale is upside down
stock barrel at rest in test fixture
stock barrel with load
dimpled barrel at rest in test fixture
dimpled barrel with load
stock barrel weight 2LB .4oz
dimpled barrels weight 1LB 9.6oz
thats a difference of 195g or 6.8 oz
here they are side by side
I have had no complaints about accuracy
no complaints at all
Marvin
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