I have a 1022 and have invested about $1800.00 into the gun. I have used all types of ammo and generally I use the federal gold medal sub-sonic. I had the end of the barrel threaded so that I can unscrew the iron site and screw on one of my .22 suppressors. I bought 5000 rounds of this ammo several years ago and still have amount 3000 rounds left. What I have found while shooting with a vice at about 70 yards through a high end scope is that the ammo is fairly precise. One problem that I have experienced is that on occasion the projectile goes supersonic thus defeating the suppressed noise. It also affects the accuracy. I live in Florida and the stated velocity for this ammo is 1080 ft/sec. The air temperature, as long as it is above about 30 degrees F should keep the projectile subsonic. However, as I stated earlier, this is not always the case.
I installed a volquartsen trigger and speed slide and definitely reccomended the trigger. Unfortunately the trigger costs more that the gun. CCI Green tag is a very good ammo. As I read another post, and I definately agree, each ammo is going to give a different outcome. The idea is to get the ammo which is consistent.
I also add that I have fired about 3000 rounds of sub-sonic ammo through either my AAC pilot or AAC Aviator suppressors and they still work as well today as they did when I got them(years ago). I let them soak (totally immersed) in Kroil for sometimes months. The Kroil changes color and a lot of crap comes out of the cans.