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BIB 108 6mm FB

The 108s shot great out of Jackie Smith's 6BR Rail Gun, with its .237" Bore Krieger. This particular barrel didn't like the Lapua Scenar 105s at all and much preferred the 108s to the BIB 95s. With about a .110 throat,Kiff-type measurement) we were just above the neck-shoulder junction with the bullet about .015" into the lands.

You'd probably want about a .150" freebore for max velocity with the BIB .108.
 

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