I've got/loaded such a round.
I use 10.0gr of Unique and a card wad from corregated cardboard over the powder, then I fill the case to 1/8" below the mouth with #8 or #9 birdshot (or larger, but that thins pattern even more-fewer shot).
I use an over shot wad cut from cardboard (such as cracker box or primer slides), and crimp the wad in place. I use a thin point maker to mark shot size on o/s wad.
Pattern is sufficent for small game to 10-15yds. As others have noted, the pattern thins out quickly. Basically it approximates a .410 1/2oz load from a cylinder bore.
My rifle will not feed or fire a .410.
It's the .45Colt that will "occasionally" feed/fire a .410. However, my Win. M94 .45lc will not feed fire a .410 as action is too short. It does fire/feed a .45lc "shot" load...
I make a "shot load" with the .45Colt cases that will feed/fire from my .410 O/U. -similar to above except I use 5.0gr of Bullseye and 0.4oz of birdshot.
But, a .45lc case that has been "hot loaded" will not chamber or extract. Only OFB from "factory" or "Cowboy" loads are useable. For such loads, I prefer the Magtech brass as it is thinner and more easily sized to fit the chambers on my .410 O/U.
FIWW; In the spring and early summer, the carpenter bee's really go after the pine trim on my Log Home (main structure is cypress, bee's ignore it...). My favorite "bee" load is the .45lc case with 3.6gr of Bullseye and instead of birdshot (it works too...) I load corn-cob polishing media (untreated). From the .410 O/U it is effective on the "Bee's" to about 30ft. A lot of fun too!