Never did understand how they could take much of a load without the top strap.
Guy that shot modern loads in the new cylinders for 45 Colt, in his 1860 Army had the arbor threads pull out of the frame. Interesting to watch as arbor, wedge and barrel went down range about 15 feet and the cylinder fell down just in front of his boots.They don't. Cylinder arbor and wedge takes it. Too much pressure and the wedge stretches the slot in the soft barrel steel. Still stronger than the 1858 Remington with full, brass frame.
Guy that shot modern loads in the new cylinders for 45 Colt, in his 1860 Army had the arbor threads pull out of the frame. Interesting to watch as arbor, wedge and barrel went down range about 15 feet and the cylinder fell down just in front of his boots.
I think it was about his forth year of Cowboy and he said his light load of 6.0 grains of Bullseye and Keith SWC was very accurate.I didn't go that far, but the Lyman 49th starting load with Titegroup and the 452664 cowboy bullet made 830 fps at 10' and raised a burr at the back of the wedge slot of my steel Pietta 1860 Army. BLL'd pure lead .454" round balls roll crimped in place run at about 800 fps with Titegroup hit to the sights and don't hurt the revolver.
Among my pet annoyances in this hobby field.Sounds about like fellers thinking 44 mag pressures in a modern made 1873 Winchester are quit compatable .
Best I can find out, the original Richards-Mason conversions used the .44 Colt with 22 grains of FFg black. That would be about 11,000 psi, or 9,000 Lead Pressure Units (shotgun measure).Its supposta handle 40 grains of that old time FFFG powder, but I don't have none of that, so I used 40 grains of Bullseye because it sounded more accurate. I had ta' pound that darn powder into the case with a hammer and a dowel because it didn't want to fit right.