I would try another scope first to see if it gets better.if not then it may be the gun. clean it reeeeeeeeeeeeal gooooood . sometimes from the factory,they are nasty little things down the tube.

I would start at 50 yards and make sure your getting a good group there first,it may be just after a few shots , you , or the gun may be off.
if at 50 you get great groups then, I would go with another scope.