DO NOT FIRE .45caliber ammo in a .410 shotgun!!
DO NOT FIRE ANYTHING but .410 shotgun shells!
Yes, there are guns that will fire both, but they are NOT .410 guns that fire .45 slugs, they are .45 cal gun that are made to also handle the .410.
Besides the fact that you don't want to cram a .45 slug down a .41 barrel, there's no rifling in the shotgun, so accuracy would be problematical, even with a correct size slug. And, they make .410 slugs, which are a bit hotter ammo than standard .45 Colt.