So yep, they can jam.

Are double barrel shotguns reliable?

Reliability. Double barrels simply have less moving parts than many other types of shotguns. As with most machines, the less moving parts, the lower the chance of one breaking. With no actions that jamb and no feeding failures, the double barrel's simple design has proven to be reliable over many years.

Are double barrels good for home defense?

A double-barreled shotgun is one of the most effective weapons that can be owned and used by the responsible citizen for personal defense in close-quarter encounters. It is relatively inexpensive and simple to operate when compared to other types of firearms.