The Ruger SP101 in .327 Federal Magnum with 3.06-inch barrel. A six-shot .327 Federal Magnum variant of the SP101. The .327's smaller case diameter allows six rounds in the SP101 frame that normally holds five .357 Magnum rounds, boosting capacity without increasing frame size. Type: Revolver Action: DA/SA Caliber: .327 Fed Mag Capacity: 6 Year introduced: 2012, USA Weight: 25 oz Overall length: 8" Status: Active Intended use: Carry, Hunting