Revolver Sealing Systems
So, I am well aware of the Nagant revolver's sealing system that uses a combination of cylinder meeting the chamber and a recessed bullet. However I was wondering if there were other known sealed revolvers? Or perhaps speculative ways to accomplish it.
Of course in the modern day, sealed revolvers aren't really a necessity. However, I remember seeing that a company was making a revolver shotgun and included a blast guard to help mitigate any damage form the shooter. It seems rather small to me and like it wouldn't do a lot. So I was wondering if there were other ways to seal or at least protect the shooter's arm for a revolving rifle like concept.
The only thing I can think of is perhaps to fully enclose the cylinder. However that would probably impede the loading process unless the enclosure swung out as well or had a way to open. A break action system seems perhaps better suited for this, as break action rifles seem much stronger than a break action handgun.