Short injectors?

OK,... looking for answers.
My engine is a 2010 6.1 all stock. I bought aftermarket fuel rails but when I put them on, the clamps didn't come close to holding them down! Do I have some oddball injectors? The stock fuel rails were tight.
I hate to take meat off of my clamp stands to make them tight. What's the deal?20170527_161748.jpg20170527_161758.jpg20170527_161721.jpg