I know that with .22 hi vel, like a yellow jacket or stinger...raccoons don't do well at all. You have to head shoot them though. When we were kids taking them for pelt, we had to shoot them right between the eyes and they gave no more trouble. Squirrels just get a CB long and providing I hit them right, they go down. Otherwise they have to get a second one. No shock value there because of low speed...