Why would you wanna fire a bullet down a smooth bore anyway, even if it wouldn't blow up? Accuracy? What's that?
I have a Contender barrel, 10", has a screw on choke and a rifled barrel. When shooting shot loads, the choke is rifled straight so as to stop the spin of the shot cup. Take the choke off and you have a 7 inch .45 colt with a 3" chamber which causes a LOT of free bore and hurts accuracy. However, it'll still shoot 7-8 inch groups at 100 yards with a scope, not THAT bad at shorter ranges. Take that rifling out of it, though, and the bullet could wind up tumbling into the dirt at 25 yards or over the backstop and out into the bay on our range, depending on the whims of the tumbling bullet. So, what's the point in wasting lead like that let alone endangering the health off the area's shrimping fleet????
And, don't even think of shooting that .45LC with the choke installed. If you want a rifle for your .410, buy foster slugs. They have about the energy level of a .357 magnum out of a handgun.