According to literature of the day ( 1956) both the Colt Police Positive and Official Police revolvers in caliber .38 Special could handle "Hi-Speed" loads then in use by those who wanted more punch than what was produced by the standard police loadings of the 158 RN bullet.
I'm not exactly sure what numbers those "Hi-Speed" loads involved (weight of bullet, velocity?). One source says that Colt claimed the Official Police was strong enough to be used with the powerful .38-44 High Velocity load. That's kind of hard to believe. If I'm not mistaken those HV loads were well beyond +P. The .38-44 claim would imply the Colt revolvers were substantially stronger than S&W police revolvers of that time.
Was that true, or should sane shooters load the .38 Colts named above to nothing more powerful that what you'd sensibly shoot in a K-frame .38 like the Model 10?
Please note I'm NOT trying to make a .357 out of either one.
Look forward to your responses.