I've been using e3 for loading 9mm and .40 S&W. I guess I've used 12lbs or so over the last year. Works great and is pretty clean. I actually sent some loaded ammo to Alliant for pressure testing; Load was 4.5grs e3 under a 180gr Zero jhp and seated to 1.20" OAL. Produced 34,500psi and around 950fps. This is my USPSA major match load. I still don't think Alliant lists e3 as a pistol powder.
EG