Well arentol, the guns may be 'tested' at 4 and five inch but lots of people pack 3 inchers. A 4 inch .44 magnum isn't really all that short and a 5 inch 1911 kind of drags when packing the 100 degree Texas weather.
And while they tested speer ammo there is lots of other ammo out there (DPX, while hugely expensive, is awful good.)
But I would not worried to much if all I had was my S&W 3 inch Lew Horten 24, .44 Spl. with DPX (or a S&W Backpacker .44 magnum loaded the same way.)
Deaf