Hornady 405 Cal .411 300 gr InterLock SP Component Bullets

• Component bullet for handloading — .411" diameter, 300 grains, for .405 Winchester and equivalent large-bore cartridges
• Exposed lead soft-point tip for controlled expansion with deep penetration on hunting game
• InterLock ring locks core to jacket during expansion, retaining mass and energy for large, consistent wound channels
• Secant ogive profile reduces drag for flatter trajectories and improved long-range accuracy
• Tapered jacket with inner grooves ensures consistent, controlled expansion across all hunting velocities
• One-piece core eliminates separation risk; cannelure allows consistent crimping and works with InterLock ring
• Component bullets for handloading; sold as projectiles only, not loaded ammunition

The Hornady InterLock SP (Soft Point) in .411-inch diameter at 300 grains is a traditional hunting component bullet for handloaders working with .405 Winchester or similar large-bore cartridges. The exposed lead soft-point tip initiates controlled expansion on impact, while the secant ogive — one of the most ballistically efficient profiles in hunting bullet design — reduces drag and promotes flat trajectories. At the heart of the InterLock design is a raised ring inside the jacket that locks into the lead core, keeping the two bonded together during expansion to retain mass and deliver deep penetration. Inner grooves in the upper jacket section weaken it progressively to ensure consistent, controlled expansion at all hunting ranges and velocities. The tapered jacket provides precise thickness control throughout, and the one-piece core eliminates the separation risk associated with divided-core designs. A cannelure works in conjunction with the InterLock ring to prevent core-jacket separation and allows for accurate, consistent crimping. These are component bullets sold for handloading — not loaded ammunition.

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