It seems that many ammo companies load pistol cartridges much slower than the cartridge is capable of. A good example is 180 grain .40 loads. Many companies load this round to 1000 fps, it the cartridge is easily capable of making 1150 fps safely in modern weapons. IIRC, I read somewhere that some company loaded a 180 to 1200 fps from a 5 inch 1911. I don't understand why. AFAIK, those velocities are attainable within the spec pressure window for the .40. The cartridges that are affected the most seem to be 10mm and .40 S&W. 9mm could probably be loaded a bit hotter too.