How many shells does 12 gauge pump hold?

A standard 12 gauge pump-action shotgun typically holds 4 to 6 shells in its magazine tube, depending on the specific model and design. Some models may have a capacity of up to 8 shells with an extended magazine. Additionally, there is usually one shell in the chamber, allowing for a total of 5 to 7 rounds ready to fire. Always check the manufacturer's specifications for the exact capacity of a particular shotgun.