I my beretta bobcat 22lr I have been using cci stingers for ccw. Today I fired 50 rounds of the winchester dynapoint 40Gr HP 22lr. They fired without a flaw. Not as much ummphf as the stingers but a great targot round and very clean shooting. My 21a is kind of picky on ammo it likes the high velocity in order to cycle properly and the dynapoints did the job.