.32 special was an odd duck from the beginning. It was originally advertised as a factory smokeless round that was promoted as being a round to be reloaded with black powder. It has a different twist rate than the .30-30, the .32 specials twist rate is for a black powder round. Black powder loads of all kinds lasted until the the start of WW2, over 50 years after semi-smokeless and smokeless powder was introduced.