Hey there:
I have lots of experience with both the 10" and 14" T/C 410 barrels. Both mine have the internal chokes. I have killed squirrels in tall trees, no problem. I usually pack the 10" because I have a neat shoulder holster for it. I have a big pond out in my back yard, never failed me on snakes. I have killed squirrels running full blast on the ground. All in all, the 410 is well worth having in a T/C.
I did put a sling on my 14" barrel, in case I want to take it out for a stroll, makes it easy to carry and handle. I handload both the 2 1/2" and the 3" shotshells for my guns. I even have some brass ones, and before I got them, used 444 Marlin cases. I just don't understand, I know, lack of demand for big time production, but 410 shells are so much higher than 12 shells, like the 22 shorts are 3 times higher than regular long rifles.
Oh, well, done wrote a book. Get you a 410 and have fun. You will like it so much, you'll have to reload, unless you a rich ole boy.
All the best,
Casper_zip