ype Caliber Grains Point Base Material S .311 123 SP BT C MONOLITHIC SPIRE POINT – TELLURIUM COPPER ATTENTION! WARNING! NOT INTENDED FOR RIFLES WITH BARRELS RIFLED FOR .308 CALIBERS! IF IN DOUBT, SLUG YOUR BARREL BEFORE LOADING AND SHOOTING! HIGH PRESSURE AND STRUCTURAL FIREARM FAILURE MIGHT OCCUR WHEN USED IN A .308 BARREL!