Weatherby Model 307 MZY with Williams Precision Standard Set 50 Caliber Graphite Black Cerakote/Black Sponge Accents Bolt Action Muzzleloader - 26in - The Model 307 MZY is Weatherby's first muzzleloader, built for hunters who demand centerfire-level performance from a front-loading rifle. Engineered on the proven modular Model 307 platform, the MZY sets a new benchmark for precision in modern muzzleloading. At the core of the rifle is the Arrowhead Gen2 Ignition System-a premium, sealed rifle primer design previously found primarily in the custom rifle market. This innovative system addresses the shortcomings of traditional muzzleloader ignition by using precision-fit primer modules with large rifle primers to deliver hotter, more consistent ignition through a short, straight flame path. The fully sealed breech eliminates blowback, protects the action from fouling, and maintains consistent headspace for reliable, repeatable performance shot after shot. Made in the USA ; Trigger Tech Trigger; Tool-less Bolt Breakdown; MZY Break; Carbon Fiber Stock; Cerakote Finish; Ignition System Traditionally found in custom muzzleloaders, Arrowhead's Gen2 Ignition System brings sealed, consistent ignition to a production muzzleloader, built around the Model 307 platform; Recommended Load Weatherby recommends 105 grains of Blackhorn 209 by weight (or 150 grains by volume) paired with Hornady Bore Driver bullets for consistent, multi-state compliant performance in the MZY. The 280 Grain .45 Cal and the 340 Grain .50 Cal Bore Drivers have proven to deliver dependable accuracy across a wide range of hunting conditions; Included 20 unprimed modules; Breech Plug; Breech plug wrench & socket; Cedar Mountain Quick Loaders (3 powder tubes, 1 quick loader); Collapsible ramrod + carry case;