This bullet was specifically designed for the 30-30 cartridge and is manufactured out of solid copper bar stock on a CNC Swiss style lathe. *PLEASE NOTE: Not for use in Pre 64 Winchester Model 94 rifles OR Mossberg 30-30 rifles Instead of mushrooming, these hollow points are designed so that after 1-2 of penetration, 6 blades break off and radiate outward in a start pattern while the base continues on for even deeper penetration. We also have tips that can be used in these bullets for those not using a tubular magazine. Use of tips in tubular magazine will cause primer to ignite. Technical Info: Caliber: .308 Weight: 110 grains Required Twist Rate: 1:12 or faster OAL: .830 Projection Length: .439 Min Impact Velocity Required for Expansion: 1500fps