Montana Rifle Company Model 1999 in 338 Winchester Magnum. MRC added the 338 Win Mag to the Model 1999 lineup for guides and hunters in Alaska and British Columbia who needed maximum stopping power in a controlled-round-feed hunting rifle. The 338 Win Mag Model 1999 is MRC's most powerful founding-platform chambering — a serious rifle for serious country. Type: Rifle Action: Bolt-Action Caliber: 338 Winchester Magnum Capacity: 1 Year introduced: 2002, USA Weight: 70 oz Overall length: 45.5" Status: Active Intended use: hunting, dangerous game