These are the Big Boy Concentricity Gauge and Correction Tools. Runout is measured in 0.01 mm increments (or 0.4 of a thou!)

Essential accurizing equipment for extremely long, high BC projectiles and ELR type cartridges. Suitable for all cartridges from 84.84 mm long (7 PRC/300 Win Mag, etc. through to the Granddaddy of them all, the 50 BMG)

Exceptional quality, Australian made product.

SKU OEPBBCGCT
Brand Outer Edge Projectiles

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