Rifles and pistols
Although they weren't as accurate, smoothbore "muskets" were easier, faster to reload than a rifled barrel. Less constriction in the barrel without rifling.
No. The barrels are not rifled
Not safely
Neither barrel is rifled.
You look down the barrel and if it is swirled it is a rifled barrel and if it is not swirled it is a smooth bore
Yes, the barrels are rifled.
Shooting rifled slugs is the ONLY way to shoot thru a smoothbore for deer. If you shoot sabot slugs thru a smoothbore, it will not spin and therefore not be accurate. For accuracy, the slug must spin out of the barrel. Either shoot a rifled slug thru a smooth barrel, or shoot a saboted slug thru a rifled barrel.
a slug is normally use in a shot gun and they are not rifled a gun with a rifled barrel should shoot a Shell that is the same caliber as the gun.
Smooth-bore refers to a firearm or cannon which does not have a rifled barrel (a rifled barrel is one with ridges that corkscrew down the barrel to impart a spin to the bullet)
Slugs! If its rifled it is a deer hunting barrel.
Most BB guns use a "Smooth Bore" barrel. It just a hollow tube for a barrel. They are not consistently accurate. Speed does help some but not much. Pellet Guns and Rifles usually use a rifled barrel, one that has grooves in it. This makes the pallet spin and gives it more accuracy than a BB. There are combination BB and pellet guns made, but they are also smooth bore. I know of one BB/Pellet gun, the Gamo P-23, that is a combo bb/pellet gun. It uses a rifled barrel and special "Led BB's." The common Steel BB will ruin a rifled barrel that's why the Gamo P-23 uses "Led BB's." This barrel makes the BB spin and more accurate. Speed will increase the distance and power of a projectile.
Assuming you mean a barrel that is for lead pellets, if the barrel is not rifled, steel shot will not damage the smooth barrel. If it is rifled however, steel shot will in fact damage the rifling.