Shotgun Spread w/ Different Chokes Tubes

For the metrically inclined:

40 inches = 1.016 meters

25 yards = 22.85 meters

40 yards = 36.576 meters

1 inches = 0.0254 meters or 2.54 centimeters

1 yard = 0.9144 meters

3 comments

Sorry I don't know anything about guns, but is this the barrel getting smaller right at the end? What would happen if you were to fire a solid slug?
- Nothing good. It would damage the choke and possibly banana peel the barrel.
  
  Chokes are removable, and it would be advised to remove them for shooting a slug.
Would the spread with the cylinder choke also be indicative of the accuracy of a muzzle loading smooth bore musket?