You need the services of a firearms instructor or a good gunsmith.
You need to find a firearms instructor.
Depends on the load.
You need to find a gunsmith or firearms instructor
Recommend you find a qualified firearms instructor or a gunsmith and ask for assistance.
You have the correct caliber cartridge, and yes, that is a decent load for defense. I would suggest that you get a box or two, and shoot them to insure that they will cycle in YOUR pistol 100.00000% of the time. Autos can be finicky about what they like to be fed- Sometimes the same cartridge by different makers gets different reliability from a particular gun.
None. While there are firearms made to shoot .45 Colt AND .410 shotshells, they are designed and made to do that. A regular .410 shotgun is NOT made to do that safely.
Needs an appraisal
how to breakdown and load 38 caliber iver johnson pistol?
load data
Have it examined by a gunsmith
Model numbers didn't start unitl @ 1957. It it has one it will be inside the crane area.
A 41 magnum caliber revolver will shoot 410 gauge shotgun shells but is not recommended. The shot will lead the barrel rifling. There are also adaptors you can put in a shotgun that allow you to fire pistol/rifle ammunition.