I was just wondering if there's much of a difference between powders for pistols and revolvers. (Especially when comparing the same / close caliber such as 38 and 9mm)
It seems that most of the manufacturers recipes I've come across have dedicated powders for pistols, and another for revolvers.
However many re-loaders I've come across use one powder for both. Is this just a marketing gimmick by the powder manufacturers, or is there a reason to choose one particular powder for revolvers and another for pistols/autos (besides just following the manufacturers recommendations)?