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The dimpling grows the diameter of the ball about .01". But unlike a ball .01" bigger, it is covered with little lead bumps that will wipe away on loading while still giving an interference fit, even as the barrel fouls up.My balls are such a tight fit that they will often create an "air piston" effect and push the ramrod back up out of the barrel while loading. In addition to dimpling, I double-coat my balls with Lee Alox. This is another windage eater but also covers all the pits on the ball so kind of eliminates the idea of aerodynamics.If you don't have an interference fit in your bore after dimpling the dimpling probably is not doing much for you.However, the ball roller does generally obliterate the cut-off from the sprue.
The dimpling grows the diameter of the ball about .01". But unlike a ball .01" bigger, it is covered with little lead bumps that will wipe away on loading while still giving an interference fit, even as the barrel fouls up.
My balls are such a tight fit that they will often create an "air piston" effect and push the ramrod back up out of the barrel while loading. In addition to dimpling, I double-coat my balls with Lee Alox. This is another windage eater but also covers all the pits on the ball so kind of eliminates the idea of aerodynamics.
If you don't have an interference fit in your bore after dimpling the dimpling probably is not doing much for you.
However, the ball roller does generally obliterate the cut-off from the sprue.
