Projectile comparisons using Vern Junkes ICC

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Question to 'Vern Junke Internal Concentricity Comparator' owners. Has anyone compared the accuracy using "junk" standard projectiles (greater than 15 deviation units) compared with "hummer" standard projectiles" (less than 5 deviation units) using exactly the same brass with all other variables kept to a minimum (that includes case neck concentricity, neck thickness, powder weights, etc).