Brass certainly varies , if new its fine But it ages yet I've seen percussion shotguns shot with these old barrels . Any barrel can burst but not with standing the great number of brass barreled guns blunder busses ect the failure rate is not commanly noted. So Brass bronze or laten .It didnt seem such a problem . The Swiss mid 17c Maker Felix Werder of Zurich championed his hammerered brass barrels 'Inventor' even engraved on some barrels . I have known brass barrels offered by Getz I think, it was at a R,vous. Its thought to be stable like soft' dead iron' barrels . I made a brass barrel pistol of Kennedy parts never shot it . .I would happily stock up a brass barrel. I made three blunder busses two had brass the other was bronze no idea of the specifications of the mix .
." When ever patients come to me , I physics, bleeds , and sweats em." " If after that they chose to die"" , What's that to me ? I Lettsom " (MD) ( Found that in an old medical book in Kathmandu allways thought it amusing ) Rudyard