Final answer:
A muzzleloader must be cleaned after shooting to prevent corrosion and fouling, which can cause rust and affect its function and accuracy.
Step-by-step explanation:
After shooting, a muzzleloader must be cleaned to prevent corrosion and fouling. The residues left by gunpowder, especially black powder which was traditionally used in muzzleloaders, can attract moisture leading to rust within the barrel.
Moreover, the buildup of residue can make future loading difficult and can significantly affect the accuracy and safety of the firearm.
Cleaning is essential to maintain the function and longevity of the muzzleloader.