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
This is a community dedicated to discussion around historical arms, mechanically unique arms, and Ian McCollum's Forgotten Weapons content. Posts requesting an identification of a particular gun (or other arm) are welcome.
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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.
Not all chokes are removeable. If you do have a modular choke you'll damage your gun faster firing without a choke tube in place faster than by firing slugs through a full choke. They make thin wall choke tubes if you want to have an open choke with a modular choke system. From my admittedly 2nd hand knowledge rifled slugs through full choke is safe, but generally inaccurate.
Yup, I have shot slugs from choked barrels on many occasions and it works just fine. Some shotguns shoot rifled slugs a little better with a modified choke than a cylinder choke.
Yes they get a bit smaller at the end to reduce the spread.
Bullets are quite malleable and it’s normal for them to deform a bit during firing. Bullets for non-shotguns typically get forced down a bit in the forcing cone before being deformed to fit the grooves in the rifling.
“Rifled” lead shotgun slugs have these grooves around the outside that allow them to deform down to a smaller diameter. You can shoot them through a choked shotgun barrel just fine.