Ok, I'm kind of new to paintball. I've really only ever used two kinds of paint(monster and prem). Are there diff size paintballs because I see people posting about getting barrel where paint will fit??? I recently bought a DYE Xcel barrel and I guess it is compatable with my paint because it shoots it, but how can you tell? Does the ball explode or something if it doesn't work with the barrel? Are there diff size pb's, or what?