Forward part of the chamber in a shotgun where the chamber diameter is reduced to bore diameter. The forcing cone aids the passage of shot into the barrel.
The rear portion of the revolver barrel, at the cylinder end, that is slightly tapered to make it easier for the bullet to enter the barrel as it emerges from the cylinder charge hole.
The tapered section at the front of a shotgun chamber where the diameter of the front end of the chamber is reduced to the diameter of the barrel bore. A forcing cone is also present in the breech end of most revolvers.
The tapered section of a shotgun or revolver barrel where the pellets or bullet is guided into the bore.
The slope of the forward end of the chamber of a rifle or shotgun which decreases the chamber diameter to bore diameter. In a revolver, the bevel in the rear of the barrel just ahead of the cylinder.
