It should be noted that other, much earlier and much weaker revolvers were termed .38/44; an example is the Model No. 3, .38-44 Single Action. This was essentially a .44 Caliber Single Action, New Model which was chambered in .38 S&W (NOT the .38-44 S&W Special or .38 S&W Special).
This was a target arm, built on a frame usually employed for a larger cartridge. The extra weight was thought to help accuracy. The .38-44 Model No. 3 fired .38/44 S&W Gallery and .38/44 S&W Target Cartridges. This revolver was manufactured from 1887 to 1910. It was a top break style revolver. Obviously, to fire a .38-44 S&W Special cartridge in one of these arms, if it would even fit in the shorter cylinder, would be disastrous.
Some early loading books (ca. 1957) had an extremely powerful .38 S&W Spl. load for the Lyman cast 358156-HP gas checked bullet. This load was carefully labeled as being for .38-44 revolvers only. A 1964 loading book from the same company has this load reduced by one grain of powder, and subsequent editions since 1973 have eliminated this powder in this cartridge altogether. Let the record show that if I did indeed assemble some of these 1957 loads (I will neither confirm nor deny this), I fired them in an N frame .357 S&W Magnum, not a .38 Spl.
It is not coincidental that more accurate methods of measuring chamber pressures occured during this time, and even more accurate measurements are possible (and becoming the norm) today.
I believe that it should be obvious from the above that hot loads in the .38 Spl. are possible; some reloading manuals even give data for +P loads, which are about 2,000 psi. over standard loads. It should be equally as obvious that to go beyond that is to court disaster.
Walt Welch