Designed to fit over a tri-cut or double-barb spear tip point that has a 7/16" outside diameter. Bushings are available to utilize a 3/8" or 5/16" diameter spear shaft. Use fingernail polish around the primer and where the bullet presses into the casing to keep ammo from flooding. Weight - 9oz. Opening - 5/16" Threads - standard 6mm.
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