Most standard/subsonic (these terms are interchangeable) loads are around 1025-1090fps and should cycle a semi-auto. The stuff for pest control like Winchester's is only 750fps and while awesome and literally whisper quiety, it wouldn't cycle my Ruger 10/22 or Ruger 22/45 Tactical pistol and turned them into single shots. CCI Standard Velocity is very good ammo and can be found online much cheaper.