I'm with 55# and the rest on this and can probably prove it. The ONLY time I EVER get any shoulder pain is when I have to tune a 31"+ bow at higher poundages. I tune thousands of bows a year and I hate to tune those longer draw lengths. I'm 29 1/2" so we're talking in the neighborhood of +1 1/2" too long for me.

I can shoot all day long and not experience any shoulder pain until that draw length gets too long for me. Get it checked out.