FWIW, in my assorted 22 semi auto pistols , revolvers, and rifles CCI standard velocity is the ONLY ammo to function 100%. Sadly every other mfg 22s have many DUDS, some fire when round is rotated in chamber which just tells me some dag gone pin headed pencil pusher has mandated a “ reduction” in primer material in the case. So be it will just use CCI. Now before I get jumped on the high end target rounds work fine, just not going to go shoot up 5-6 boxes of Eley or similar.