Trail Boss in a BP wheelgun.....last year a friend of my son loaded up full cylinder of a brass '51 navy in .44 cal. The idiot was told use BP or BP subs by everyone, but "Hillbilly Boy" knew different and besides, he liked the picture of the cowboys on the can! The number of braincells he had could be counted on one hand!
Goober blew off chunks of his hand. Tore a hole in his head, but the steel plate in his head from an earlier act of stupidity, kepts some of the parts that flew back from digging too deep in his skull. The weapon simply exploded in his hand with the cylinder being in pieces, the hammer went off into the ozone, and the barrel was found some distance out in the field.
I know an ROA is a fine stout weapon, and the idiot that used TB in his weapon was a brass frame, but I call that lessons learned. I am retired now from gunsmithing, but still keep up with things as best I can. I know that in my .45-70, 12 gr of TB with a 350 gr bullet will net something like 21K in pressure (If I remember right) and it is safe there. I'd never even attempt to use any smokless in a BP weapon period.......
Just my 2 cents worth....Wade