The Weatherby Model 307 MZY .45 caliber muzzleloader (brand part no. 3MZY01N45R8B) is Weatherby‘s first muzzleloader, built for hunters who want centerfire-style precision from a front-loader. It is based on the Model 307 action and finished in Graphite Black Cerakote, with a spiral fluted bolt and barrel. Its sealed Arrowhead Gen2 ignition uses reusable modules with large rifle primers, which Weatherby says eliminates blowback and protects the action. A carbon fiber stock and an adjustable TriggerTech trigger round out a rifle meant for deer season at long range.

Key Specifications

• The caliber is .45, a smaller bore that pairs with the 280-grain Hornady Bore Driver bullet Weatherby recommends.
• The barrel is 26 inches, with a 2-inch muzzle brake bringing the barrel assembly to 28 inches.
• The twist rate is 1:20 for the .45 caliber chambering.
• The weight is 7.1 pounds, light enough to carry on a long stalk.
• Overall length is 45 inches on a number 4 contour barrel.
• The muzzle is threaded 3/4-24 for the included brake.
• The ignition is the Arrowhead Gen2 system, a sealed design that uses large rifle primers in reusable modules.
• The trigger is a TriggerTech unit, adjustable down to 2.5 pounds with a two-position safety.
• The stock is Peak 44 carbon fiber with a 13.25-inch length of pull and a 3DHEX recoil-reducing buttpad.
• The finish is Graphite Black Cerakote on the receiver, barrel, bolt and brake.

Frequently Asked Questions

What is included with the rifle? Weatherby lists unprimed primer modules, a breech plug wrench and socket, and Cedar Mountain Quick Loaders with powder tubes.

What powder and bullets does Weatherby recommend? Blackhorn 209, measured by weight at 105 grains or by volume at 150 grains, with Hornady Bore Driver bullets in the caliber-specific weight.

Is it available left-handed? No. Weatherby lists the Model 307 MZY as right hand only.

Buy the Weatherby Model 307 MZY .45 Caliber Muzzleloader, 26-Inch Barrel with Brake

A muzzleloader that shoots like a centerfire is a different kind of deer rifle. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your door, and see more of Weatherby’s bolt-action rifles.