I have recently started to use Universal Clays for 9mm lead bullet reloads and have so far had good results.
Trail Boss is not a suitable powder for 9mm, as it is too bulky for the case capacity available. Even fairly fast-burning powders like Bullseye, W231/HP-38, or Titegroup often fill up a 9mm case well enough that a double charge is easy to spot if you are paying attention.
Trail Boss is not a suitable powder for 9mm, as it is too bulky for the case capacity available. Even fairly fast-burning powders like Bullseye, W231/HP-38, or Titegroup often fill up a 9mm case well enough that a double charge is easy to spot if you are paying attention.