I made the Taurus Judge my vehicle gun several years ago. Mine are stainless steel with 3" chambers. The rifling is an advantage because it opens the pattern more for close shots. I consider a steel gun to be a must because of the recoil. It's a small frame gun so if you have .45 Colt in it (something I can't comprehend), you should only used standard loads. I use shells that hold five 000 Buck. That's an advantage of the Taurus over the S&W. For some reason, S&W only makes their .410 with 2 1/2" chambers.
I have a T/C Contender and a .45/.410 barrel. It throws much tighter patterns so it's suitable for clay pigeons. I would only consider it a last resort for self-defense.
I have a few long guns in .410 as well, They're fun, but nearly so much as some others. I never carry any long gun without a specific reason. They're nothing but a nuisance for rambling. They're an idiotic choice for use in the home. The only reasonable shotguns for home defense, apart from .410 handguns, are Class 3.
There's an outstanding website addressing .410 guns and ammo. It's a British website, but they discuss many that are not allowed in that once great country. There's a link to a book on the homepage. The title is
Because It's There: Climbing the North Face of the .410. It's an absolute winner.
http://www.fourten.org.uk/