Hi
I have a contender with a 14 inch .410/.45 barrel. The kick is quite mild with 2 1/2 or 3 inch .410. I haven't shot many hand guns , but I can say it is no way near the kick of my friends 5oo S&W.
There is a choke that is removed with a special tool if you remembered a touch of anti seize on the threads. The inside of the choke has 6 vanes that create the choke effect. Point is that if you plan on a reloader you'll need to use a modern style shot wad for the choke to be effective. The choke must be removed to shoot .45 long colt and save your money on slugs, they will not group with or with out the choke.
The .45 LC works well. It seem the bullet likes the long jump to the lands. Also the .45 can be loaded real hot compared to the off the shelf loads.(Just check out the heavy frame hand gun section in some loading manuals.) Williams Gun sight has some dandy sights that will mount on the vent rib, making a 145 yard shot on a deer easy.
Think about reloading .410. with a loader like MEC 600 Jr. A 1/2 ounce of shot, about 6 or 7 cents, 3 cent primer, 3 cent wad, and about 4 cents of "lil gun" powder and no more than 20 seconds per reload. compare that to 25 over priced redi loads in a 2 cent card board box.Your investment will return fast if ya shoot it half as much as I. Its a real hoot to shoot.
At 50 feet a load of #9 has holes large enough for a starling to slip by. I would use #5 or #6 sot for rabbits and expect lots of misses.
Practice practice.
A load of #4 s at about 15 feet will cover a chuck... they do little more than twitch.
I' happy with the 14 inch, I fear a shorter length would let the pattern to open to far to soon. Just my feel......Hope this helps.
Terry