The Ruger Single-Seven is a 7-shot single-action revolver in 327 Federal Magnum — the only major production single-action revolver for this cartridge. The 327 Federal generates 44 Mag-class energy in a smaller case with 7-round capacity. 4.62-inch barrel in blued or stainless. Type: Revolver Action: Single-Action Caliber: 327 Federal Mag Capacity: 7 Year introduced: 2014, USA Weight: 34 oz Overall length: 10" Status: Active Intended use: Hunting