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Old 10-03-2019, 11:33 AM
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Idaholewis
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Join Date: Mar 2016
Location: North Idaho
Posts: 422
Default New Green Mountain .50 Cal Roundball Barrel Test
I just got my new .50 Cal Roundball Twist (1:70) Green Mountain Barrel, This is an Old Stock GM IBS Barrel (Interchangeable Barrel System) The Barrel came disassembled and in the White, I spent most of a Day tinkering with it (Degreasing, Blueing, fitting etc.) I have this Bore Polished to a MIRROR Finish. She was ready for a Trip to the Sand Pit This is the Roundball Rifle i will be Testing some SERIOUS Distance with

Target is about 80 Yards here

5 Shots


When i say this Bore is GLASS Smooth, it most DEFINITELY is!! Bore pics are tough, But I think you will see what i mean here, You Simply Cannot get a Bore any more Silky Smooth than i have this one


Patches look awful, But it Shot good? This was 70 Grains by Weight of Swiss 2F, This powder is VERY noticeably Hotter than Goex, But I wouldn’t think 70 Grains is to much?
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