1894s I'm eyeballing on websites are variously described as having 2 1/2" or 2 3/4" chambers, while I have read that the common chamber length for this model was 2 5/8". What's the real story here? Is chamber length stamped on the barrel flats?

Another curious thing is that a number of the 2 3/4" guns are damascus. It seems to me that the fluid steel barrels would be more likely to have been bored with longer chambers.