Just got my new R9. Field stipped it.
I kind of wish you'd just gone and fired it without touching it first.
Mine came well oiled when new so it sure didn't need any lubrication, so if you just looked down the barrel to check for any possible obstruction from maybe packing material, it should have been ready for the first trip to the range.
I only mention that because it's "possible" that you might have put it back together in a way that might have created the problem.
No, you probably didn't, but firing it out of the box would have been a better reference for it's dependability.
When I got my brand new R9s Stealth a month ago or so, I noted that there was visible oil on the slide rails and it felt nice and smooth when racking.
So I just went and shot it, and it ran like a Singer sewing machine from the get go (in my case, with HST's).
Just thinkin' out loud...