I can't really tell with the lighting but I belive that you have the names backwards Charlie should be Shelby and Shelby should be Charlie but again it could just be the lighting, The lighter (white with black edges) one's are almost always a roo (or so I am told) and darker black one's (black with white edges) are always the hen. This is my first batch of PBR's so I am waiting to find out....
The rule I have works everytime if it crows or lays I will know for sure what sex it is.