A multipurpose tool includes four distinct tools and two containers which are used in the charging and priming of a modern muzzle loading firearm, and following discharge, removal of spent or unfired primers. The components include a water-resistant chamber for containing cartridges or propellant powder charge pellets and bullets of various calibers, a water-resistant chamber for protecting a pre-positioned primer, an integrated and extensible primer removal tool, an integrated and extensible primer retaining and insertion tool for quick primer removal and replacement, an integrated bullet starter, an integrated universal ramrod T-handle adapter, removable water-resistant storage chamber end caps and lanyards for loss prevention. The replaceable primer tool can accommodate removal, storage and insertion of multiple types of primers.