I have 2 Model 42's at this time. Both pre-war Skeet guns.
Finish challenged, one with aftermarket wood that doesn't match and the other w/o wood.
The one that is shootable is enjoyable to use. I load 2 1/2" shells for it.
I started reloading for 410 when I previously owned a Browning '42'.
That was a very nice gun as well. I would recommend that gun to anyone wanting a nice pump 410.
Likely pretty pricey now, but most any 410 will be.
Many shooters are handicapped when using a 410 just because they have been told over and over that 'it's just a 410' and it doesn't have the power of the bigger gauges.
That can get into your head.
But the velocity of the 410 is the same as the 12, 16 or 20 gauges..
right there at 1200fps.
The shot is traveling at the same speed.
There is just less of it in the payload that's all.
So you use a smaller shot size like #8 to increase the # of individual bb's in the pattern.
For hunting you will likely want to use larger shot, but again keep in mind that there will be very few pellets in the load.
Then limit your max distance to less than what you would take with the larger gauges do to the thinning out of the pattern at those longer distances....less bb's to fill in the same dia pattern circle.
Also you will do well to carefully pattern a 410 on paper.
The small bore is very touchy as to different loads, shot sizes, choke, shell mfg, ect.
Most single shot and inexpensive Sxs 410's are choked Full in some marketing idea to increase the range of the small bore.
Many are even Full+ and that can wreck the patterns with some loads.
Mod or even IC will often give a much more even pattern.
Patterns can vary wildly in a 410 from one OTC shell to another.
410 factory ammo is the most expensive to buy.
Reloading can really help you get the most from the 410 plus it makes it very inexpensive to load your own.