Hey guys, I have a couple of questions for you. My son, who is 8, has started to take interest in competition shooting. He has shot 22lr a few times both handguns and pistols. He is skinny and not as tough as other kids his age, yet he is a skilled baseball player as well as a soccer player so he has the athletism on his side. What calibe would you use to start a kid like him and what pistol? Thanks for your help guys!!