I shot a hundred or so AA-5 158 gr .38's out of my new 2" Charter Arms Undercover the other day, and was getting repeatedly sprayed in the face and hands by all sorts of unburned/semi burned powder.
Later, as I scrubbed all the powder doody off of me, I resolved to not use AA-5 for .38's anymore and stay with either WST or Titegroup.
FWIW, many Glock reload KB!'s were with AA5. There's something about that stuff....read the bottom of this page:
http://communities.prodigy.net/sport...-glock-kb.html