The 4" Model 610 in 10mm Auto using full-moon clips is the compact hunting and carry configuration. The 10mm in a revolver provides more power than .357 Magnum with full-moon clip reload speed approaching semi-automatic capability. Type: Revolver Action: Double-Action Caliber: 10mm Auto Capacity: 6 Year introduced: 1989, USA Weight: 46 oz Overall length: 9.5" Status: Active Intended use: Hunting / Competition