They have an article on "Cap & Ball Revolvers" in their april 2021 issue and on page 74 they say "The power of these cap and ball revolvers is anemic by today's ballistic standards."
A rem 1858 (8 inch barrel) with a heavy but perfectly safe load of 40 grains BP has the muzzle energy of a factory load in 44 special or 45 ACP (not a +P).
An ROA has a slightly larger powder chamber and as strongly built as it is, could likely handle 50 grains of BP, though i've never tried that myself. In fact i suspect an ROA could even handle low pressure smokeless powder. Of course ruger says that's suicide. but they have to say that. It would be dangerous with a rem 1858 which is a true Civil war replica gun, but the ROA is much much stronger.
A rem 1858 (8 inch barrel) with a heavy but perfectly safe load of 40 grains BP has the muzzle energy of a factory load in 44 special or 45 ACP (not a +P).
An ROA has a slightly larger powder chamber and as strongly built as it is, could likely handle 50 grains of BP, though i've never tried that myself. In fact i suspect an ROA could even handle low pressure smokeless powder. Of course ruger says that's suicide. but they have to say that. It would be dangerous with a rem 1858 which is a true Civil war replica gun, but the ROA is much much stronger.