I think you will find the pressures a lot lower on the flobert caps. Rottweil produced a short copper shell loaded with a round ball and propelled by priming compound only. They are relatively accurate because they are round balls. In North America, we have a CB cap which seems to be a .22 short shell with a light elongate bullet that is less accurate in my experience, in most rifles because of the bullet jump to the rifling. I think they are loaded with priming compound only.
I suspect that neither cartridge produces more than 5 or 6000 psi but have no data to back that up. The original bp loads must have been pretty low pressure judging by the cylinder thickness on many of the pistols chambered for it.
cheers Doug
