Pistol bores are usually rifled , while most shotgun bores are smooth , and that single difference changes how each gun stabilizes and delivers its projectiles. Pistols are designed to fire single bullets with spin for accuracy, whereas traditional shotguns are designed to spread multiple pellets over an area rather than hit one tiny point.

Basic bore design

  • Pistol (and other handgun) barrels have spiral grooves called rifling cut into the bore, with raised lands between the grooves.
  • This rifling grabs the bullet and spins it, which greatly improves accuracy and effective range.
  • Typical shotguns have a long, smooth interior bore with no rifling so that a shot column (pellets plus wad) can travel without being forced into a tight spin.

Pressure, walls, and construction

  • Pistol barrels are relatively short but have thick walls to handle higher pressures from modern handgun cartridges and to contain the rifling cuts.
  • Shotgun barrels are long and made of comparatively thinner steel, because standard shotgun shells operate at lower pressures and the smooth bore does not remove material for grooves.
  • The bore of a shotgun is sized by gauge (12, 20, etc.), while pistols are usually described by caliber (9 mm, .45, etc.), reflecting different internal dimensions and cartridge systems.

Effect on how they shoot

  • A rifled pistol bore sends one bullet downrange on a predictable, point‑focused path, making it suitable for precise shots at moderate distances.
  • A smooth shotgun bore allows the shot charge to spread into a pattern, which is ideal for hitting fast‑moving, relatively close targets like birds or clay pigeons.
  • If a shotgun barrel is rifled (for slugs), it behaves more like a rifle or pistol in principle: the slug spins for accuracy, but traditional pellet loads pattern poorly from such barrels.

Handling, use, and “feel”

  • Because of rifling and bullet design, pistols emphasize controllable recoil for fast follow‑up shots and accuracy within typical defensive or competition ranges.
  • Shotguns, with their smooth bores and shot loads, trade pinpoint precision for pattern coverage and are widely used for hunting birds, sport shooting, and close‑range defensive roles.
  • In many firearms safety and hunter‑education materials, this core distinction is summarized simply: handgun/rifle bores are grooved for spin; shotgun bores are smooth for spread.

Information gathered from public forums or data available on the internet and portrayed here.