That myth about 2200 ft/s is completely ridiculous and has no scientific merit at all for one simple reason; it completely ignores what makes that velocity actually matter in an interaction between any two objects, which is force. Energy and momentum. The mass and size of a bullet - among a lot of other factors - are going to very drastically affect how much velocity it needs to be able to do such things, because those variables determine whether or not the impact is even going to matter. A heavy object is going to require very little velocity to cause severe damage to all kinds of tissues, even ones protected by bones, and the fact that boxers can have organ bruises after matches is all you need to prove this. On the other hand, a very small and light object like a BB could be travelling at thousands of feet per second and still not have the necessary energy or momentum to commit to any damage, not to mention its shape is not conducive to either any kind of impact force or any kind of deformative force. You're oversimplifying the subject and in the process of doing so, you're spreading disinformation.
Let's not lie to people coming here for education. They're adults, not children.