So on the way to the shop I stopped by a couple other shops and took a look at their SR-556s, they all exhibited the same use as mine. So, I gave Ruger a call and the guy there said they run a few mags through all of their rifles before shipping. OK.
I went to my original gun shop anyways and took a look at the other Ruger they had there, showed the same amount use... guess I freaked out for nothing, I am keeping the rifle.
I will give huge props to the store... NW Armory in Portland. They were ready to swap the gun out or order me a new one no questions asked. In their own words... "we will do whatever it takes to make you happy".
And after talking to other SR-556 owners, their gun exhibited similar use... so lesson learned.