The Rio Royal BlueSteel Heavy Magnum 12 Gauge 3in #1 Shot Shotshells (brand part no. RBSM401) bring competition-grade consistency to a heavy magnum load. Rio Ammunition pairs a clean-burning, single-based powder with a precisely matched wad and primer, delivering strong velocity, moderate pressure, and smooth recoil. The 1-3/8oz payload of #1 shot produces dense, compact patterns whether you’re on the trap line or in the field.

Key Specifications

• Chambered in 12 gauge, fitting any 12ga shotgun rated for 3in magnum shells.
• Shell length is 3 inches, a heavy magnum load for extended range performance.
• Carries a 1-3/8oz shot payload for dense, consistent patterns.
• Loaded with #1 shot, sized for larger game and longer-range targets.
• Packed 25 rounds per box, sized for a full session without excess bulk.
• Built with a clean-burning, single-based powder matched to the wad and primer for smooth recoil.
• Delivers moderate chamber pressure for consistent, repeatable performance.

Frequently Asked Questions

What shot size does this load use? #1 shot, loaded to a 1-3/8oz payload for dense patterns at extended range.

What makes this a heavy magnum load? The 3-inch hull and 1-3/8oz payload deliver more shot and energy than a standard 2-3/4in shell.

Buy the Rio Royal BlueSteel Heavy Magnum 12 Gauge 3in #1 Shot Shotshells

Pattern dense and hit hard with Rio’s heavy magnum BlueSteel load. Order from Rio Ammunition‘s shotgun shells lineup and our Lubbock, Texas team will ship it out fast.