I have to stop doing all these side jobs, since I am retired and have too many fun things to do. Measured about 15 guns, both sides of the 1898 date. I can find no correlation between antique and post-antique guns. Certainly nothing that a soft lead bullet cannot handle with little or no difference in pressures. As I mentioned before, no change is design or barrel rifling and diameter by what I am observing and I have never read any accounts of barrel changes made during or after the transition from BP to smokeless.

The chart below includes models, serial number ranges, measurements, and ship dates.

38 Perfected, 1st Model . . . . . . . . 8,XXX . . . .361 . . . .1912
38 Perfected, 1st Model . . . . . . . 38,XXX . . . .359 . . . .1913
38 Perfected, 2nd Model . . . . . . .57,XXX . . . .360 . . . .1919
38 DA, 3rd Model . . . . . . . . . . .222,XXX . . . .361 . . . .1889
38 DA, 4th Model . . . . . . . . . . .485,XXX . . . .362 . . . .1906
38 Single Action, 2nd Model . . . . 14,XXX . . . .362 . . . .1878
38 Safety, 2nd Model . . . . . . . . . 72,XXX . . . .361 . . . .1893
38 Safety, 3rd Model . . . . . . . . .115,XXX . . . .360 . . . .1902
38 Safety, 4th Model . . . . . . . . .200,XXX . . . .360 . . . .1906
32 Single Action . . . . . . . . . . . . .56,XXX . . . .312 . . . .1871
32 Safety, 1st Model . . . . . . . . . . .4.6XX . . . .312 . . . .1889
32 Safety, 2nd Model . . . . . . . . 217,XXX . . . .312 . . . .1920
32 DA, 2nd Model . . . . . . . . . . . .20,XXX . . . .311 . . . .1881
32 DA, 4th Model . . . . . . . . . . . 247,XXX . . . .310 . . . .1905
32 DA, 5th Model . . . . . . . . . . . 272,XXX . . . .311 . . . .1905

__________________
Gary
SWCA 2515