system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If rifle barrels are rifled, made to fit 1 type of bullet and last a long time, how come shotgun barrels arent destroyed after having a bunch of metal shot bouncing around in them?
gpt
Most shotgun barrels are smooth bore, meaning that they are a straight pipe with smooth sides. The shot is held together by a "wad" which is like a little cup that separates the shot from the powder. Rifled shotgun barrels are available for slugs, though.