ORIGINAL: mouthcaller
I would do two things.
1. Borrow or buy some more chokes and see if that corrects the problem. In other words, find out if it is the choke or the barrel.
2. If it is the barrel I would get rid of it. I would never trust it again.
I agree with the first one. But, don't with the 2nd. You would be VERY surprised at the number of guns that come from the factory with the POA being off. Call the company and ask them if they will take the gun back and change the barrel. I know that Browning and Mossberg will.
Try another load and choke before you do all of that though.