Well, i bought 5 boxes of CCI quiet ammo.  So far i'm not too impressed with them.
 
  First off, the  diameter of the bullet is such that i have to push the slide closed after each shot with my thumb on my old Colt Woodsman.  Yes, i do have to manually work the slide after each shot too, and i'm fine with that.  I just don't like having to push the action closed so the bullet will seat in the chamber.
 
  Second, i've shot 5 racoons with them so far, and unless you make a direct brain shot, they don't kill all that well.  The Remington Cee Beee's kills tso much faster it isn't even funny.  The Rem. bullet is designed 100% better for hunting.
 
  As far as noise, they still are pretty loud, as loud as Cee Beee's and both of those are much louder than Super Colibri's.
 
  DM