RE: 410/22
Pretty certain that the Springfield M-6 Scout is available in .22lr over .410 (not to mention MANY other combinations.
I had a .22Hornet over .410 M-6 Scout, I bought mine for $165 New at a gunshow. The ONLY pitfall is the trigger, which is a large grip trigger, handy for shooting with gloves, not so great for accuracy until you get used to it. I used mine for squirrels a lot, it was a great gun, I sold it about a year ago and bought a .410 side by side, sometimes I wish I hadn't, but the SxS .410 is pretty hot too.