I switch between the Aguila subsonics and CCI Quiets (40 gr each) in my 22/45 with a suppressor. I am starting to prefer the CCI's, as they cycle a bit better than the Aguilas, but when you're talking subsonics in a semi auto with a can, cycling is going to be hit or miss. The CCI's are plenty accurate and very quiet and clean.
Of course, they hit soft, but even with that they'll do a lot of damage at shorter (25-40 yards) ranges. I keep a few thousands around just cause they are fun and if the time comes when folks need to get their heads aerated with extreme stealth, these things will be very useful. I have shot them with the can in the house and my wife, who has ridiculously good hearing, had no idea from about 50 feet away (I wasn't shooting at her...)
CCI has the quiets in stock on their website at $5.99/50 with a 10 box limit, which isn't bad these days.
