OT (sorry): That's interesting, Bob - I feel like my J-38s are almost certainly stronger than my K-38s (amount of forcing cone in the cylinder window, thickness of cylinder at the bolt cut). Goes to show you that two sensible people can look at the same thing and nevertheless derive different opinions.

Now you all have me wondering about the old-time 2400-loads for the .38/158 that I passed by in my rush to play with SR 4756.