Magnum cartridge
firearms cartridge with a larger case size than, or derived from, a similar cartridge of the same bullet caliber and case shoulder shape
en-GB/ˈmæɡnəm ˈkɑːtɹɪd͡ʒ/
en-US/ˈmæɡnəm ˈkɑɹtɹɪd͡ʒ/
firearms cartridge with a larger case size than, or derived from, a similar cartridge of the same bullet caliber and case shoulder shape