A lead off from my last question, the actual ballistics of the round. I've learned from the last question and ran some numbers and come up with a basic idea for the ballistics of the revolver.
Lead 11.24 g/cm3 Tungsten 19.25 g/cm3 DU 19.1 g/cm3
Lead, solid, 19.25*26.17mm, 1500 grain weight
Lead, cavity. 19.25*32.75mm, 1500 grain weight
Tungsten or DU, solid, 19.25*30.84, 3000 grain weight Material examples chosen for weight.
All measurements of projectile and assuming pure material, there could be anything in between but let's assume these are the main three.
The lead bullet would be the one safer for humans to fire and it would do it by using the short barrel to it's advantage. Smaller bullet, quicker to accelerate, would leave the barrel with half the powder left to burn. In theory, half the push, half the velocity and half the recoil as compared to the 3000 grain bullet. Of course at the cost of wasted powder, there is no free lunch. Since the bullets have to be the same length, approximately, this is my theory as to a potential solution.
Then you have the tungsten twice the weight and almost the same size. Assume that in the world this exists there are two variants of the rifle bullet, subsonic and supersonic. Lighter is super, heavier is sub, basic physics if I'm correct. The supersonic, as detailed above, would never get up to speed in the handgun though since the subsonic will accelerate slower it just barely might. Would this work out in reality?
If the above points are reasonable takes on physics then any problems existent could be solved, at least in theory, by a different powder type for the revolver. Or alternatively just using stock rifle rounds and contenting with waste/less than optimal performance. And as near as I can understand, with this I've reduced the problem to just the powder. This being scifi I can just leave the specifics for that in the air.
All of this could fit in a modified 50 BMG case and a 5" long cylinder, again assuming some liberty with the exact science of powder.
The specific compound for the smokeless powder would be getting into the actual science, a deep dive impossible to calculate. Bullet shape is either a flat top cylinder or a spitzer equivalent in size. Assume ideal range to be 40 yards maximum out of the revolver.
The exact question is a reality check on my assumptions, are they reasonable? Realistic?
Previous question to the same effect about the handguns themselves, Could a 19.25mm revolver actually exist?
3000 grain moving at 850 FPS, 6526 joules
1500 grain moving at 1000 FPS, 4517 joules
Maximum estimated range, 40 yards.