The Winchester Model 70 Extreme Weather .300 Win Mag (Winchester part no. 535242233) is a bolt-action hunting rifle built for rain, snow and rough country. Winchester fits it with a Bell and Carlson hand lay-up composite stock, a free-floating fluted stainless barrel with a muzzle brake and a Pre-64 style controlled round feed action. The classic three-position safety and M.O.A. trigger round it out. It is a proven choice for elk, moose and other big game.

Key Specifications

• The chambering is .300 Winchester Magnum, a long-range magnum for elk, moose and other big game.
• The barrel is a 26-inch fluted stainless design that is free floated, with a recessed target crown to protect the rifling.
• The muzzle has 9/16-24 threading and a muzzle brake, which helps reduce felt recoil.
• The magazine capacity is 3 rounds in a hinged floorplate magazine.
• The rate of twist is 1:10, a good match for heavy magnum bullets.
• The rifle weighs 7 pounds 4 ounces and measures 46.75 inches overall.
• The stock is a Bell and Carlson composite in textured charcoal gray matte, which improves grip in wet weather and has a sculpted cheekpiece.
• The recoil pad is a Pachmayr Decelerator, which takes the bite out of magnum recoil.
• The three-position safety locks the firing pin in the middle position while still letting you work the bolt.
• The controlled round feed claw extractor grabs the cartridge as it leaves the magazine, which supports reliable feeding.

Frequently Asked Questions

What does MB stand for on this model? On the Extreme Weather MB, Winchester pairs the fluted stainless barrel with a muzzle brake, which reduces felt recoil on the .300 Winchester Magnum.

Does it use controlled round feed? Yes. Like all Model 70 rifles today, it has a Pre-64 style claw extractor with controlled round feeding, so the cartridge base is held as it leaves the magazine.

Does it come with scope bases? No. Winchester notes that scope bases and rings are sold separately, although the receiver is drilled and tapped for them.

Buy the Winchester Model 70 Extreme Weather MB Rifle, .300 Win Mag, 26-Inch Fluted Stainless Threaded Barrel with Muzzle Brake

A stainless, fluted and braked Model 70 in a weatherproof stock is built for hunts where the conditions turn. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see more bolt-action rifles too.