When I lived in Albuquerque 64-74, police were nor permitted to carry .357 ammo.Knowing one very well he asked me to work up a load in a 38 sp case that was probably a +P or better. I did so and you could not tell the difference between them and a commercial round looking at them.It ended up about 1/2 dozen officer carried them.
This particular LEO was only one of a very few that qualified to carry a single action revolver as a duty weapon. If any one doubts me, I can give his .
The case capacity of the .38 Special is enough to duplicate .357 Magnum. The only reason they lengthened the case for the .357 Magnum was to prevent anyone from using them in a .38 Special revolver.
