This discussion reminded me of a case. About 20 years ago I examined a revovler used in a shoot-out with police. It was a Colt Army & Navy revovler from the early 1890s, and chambered in .38 Long Colt when all handgun cartridges were loaded with black powder. The suspect was using .38 Super+P in the revolver designed for the pressures of a black powder .38 Long Colt cartridge. The amazing thing is that the cylinder did not split, but that barrel sure did. The suspect; he ended nose down in the grass.