Yes it could be done, but you would have to locate a smooth bore barrel to change it with. Remember smooth bore barrels are not as accurate as a rifled bore barrel.
A Cylinder bore has no choke at all.
The bore is the inside diameter of the barrel. Simply put, it's the hole down the middle of the barrel.
Bore is the number of lead spheres the diameter of the barrel it would take to equal one pound. Ergo, the larger the bore, the smaller the barrel.
A shotgun barrel with a cylinder bore choke.
The end of the barrel where the projectile leaves the barrel on firing.
The bore is the inside of the barrel of the gun. Bore dimension for most rifles is caliber, which is the bore diameter in fractions of an inch or in millimeters. Some older big game rifles had designations such as "12 bore", which is bore diameter the size of a shotgun barrel of the same gauge. Gauge is the number of round balls fitting the bore that can be made from a pound of lead.
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The bore is the inside of the barrel- that is, the hole that the bullet is fired through. The diameter of the bore is measuring how wide the bore is from one side to another.
Take it to a gunsmith.
smooth bore
smooth bore