The Hornady InterLock 9.3mm .366 286gr SPRP Bullets (Hornady part no. 3560) are 286gr 9.3mm/.366 projectiles from Hornady’s InterLock line. Hornady’s traditional InterLock bullets use an exposed lead tip for controlled expansion and a secant ogive profile for ballistic efficiency, with the InterLock ring keeping core and jacket locked together to retain mass and energy during expansion. Each box holds 50 bullets, enough to develop and confirm a load before committing to a full run. It’s a good fit for hunters loading traditional controlled-expansion big-game rounds.

Key Specifications

• Weighs 286 grains, the exact charge weight this bullet is engineered around.
• Sized for 9.3mm/.366 cartridges.
• Boxed 50 per box, enough bullets to work up and confirm a load before a full production run.
• Uses Hornady’s InterLock bullet construction.
• Ships at approximately 2.1 lbs, the confirmed box weight for this item.

Frequently Asked Questions

What does the InterLock ring do? It locks the core and jacket together mechanically so they stay joined during expansion, retaining mass and energy for deeper penetration.

Is this bullet jacketed or monolithic? Jacketed. It uses a traditional lead core under a gilding metal jacket, not a solid-copper monolithic design.

Does the box include brass, primers, or powder? No, this is a bullet only. You supply brass, primers, and powder to complete your handload.

Buy the Hornady InterLock 9.3mm .366 286gr SPRP Bullets

Stock up on 9.3mm/.366 InterLock projectiles for your next reloading run. Hornady builds the InterLock line to consistent tolerances lot after lot, and you can browse the rest of the reloading bullets we stock. Order your box from our Lubbock, Texas gun shop for fast, insured shipping.