An 850 bar gun has a service pressure standard (NOT proof pressure) of almost 11,000 psi--not far under the SAAMI 12ga service pressure standard of 11,500 psi.
There used to be an old wives' tale that black had a much different pressure curve than smokeless. Yes, different--but not much different. As established by both the Dupont chart above and by the tests Sherman Bell ran and reported on in Double Gun Journal. If a gun is safe at pressure X with black powder, then you're not risking it shooting smokeless loads at the same pressure.
Last edited by L. Brown; 04/08/13 06:47 PM.
