According to Leupold's website that scope has 49 MOA of windage adjustment. That's close to 25" left and right at 100 yards! Some simple math shows that without adjusting windage the scope would only need to be rotated less than 1/2 degree out of true to use up half of the windage adjustment. If the scope base holes are off 0.5 degrees from true you could be at the end of the adjustment in the scope. I'm not a fan of Savage rifles having seen some terrible quality from them, so if Leupold determines that the scope is good, your next call might be to Savage. One trick I've used to check the alignment of the scope base threaded holes is to thread in some scope rail screws without the rail which which will show if the holes are off relative to the centerline of the receiver and barrel.
Another thing you could do is rotate the scope 90 degrees in the rings and use the elevation adjustment as windage adjustment. You could use this method to rule out the receiver or windage turret as being the problem ... maybe.
Another thing you could do is rotate the scope 90 degrees in the rings and use the elevation adjustment as windage adjustment. You could use this method to rule out the receiver or windage turret as being the problem ... maybe.