I can’t be helpful with your questions. I only have one Model 24 and the only experience I have had with it, was to verify that the very rare 9 mm Rim Fire Shot cartridge barrel would fit on the action. It was a perfect fit. These barrels were later rifled and chambered for the .357 Magnum cartridge. At the time I was fitting the barrel to the M24, I did not think to see if the newly chambered .357 round would fire in the M24. Most likely not, since it was originally chambered for the R.F. Round.
Yes, the receivers were cast as you can tell when looking at the internal parts of the action. Also, the barrel lugs were cast as part of the barrel. I show a picture of an unfinished casting in my book.
Hopefully someone else can help with your questions. Best wishes,. Garnett
