"There is a general attitude that revolvers were all made to shoot lead bullets. Interestingly, Model 1917 revolvers were expected to shoot 230 gr hardball when they were produced."

True enough, but in 1917 there would have been very little experience in firing FMJ bullets in a revolver to know if bore wear would have been a problem or not. I can't think of any military FMJ bullets anywhere being used in revolvers at that time. Of course the German Luger and Mauser pistols were using FMJ bullets, as well as the U. S. M1911, but those were in semiautomatics, and I know nothing about their barrel metallurgy. Every Colt M1917 barrel I have seen has very light rifling. Whether they were made with very shallow grooves or resulted from firing jacked bullets in quantity I have no idea. I also have a 1920s M1911 barrel with its rifling visually in about the same condition.