woodsmaster,
This is not just a problem with bottom-tier doubles. Have seen it with FAR more expensive shotguns, both SxS and over-under. But it is indeed rarer with those guns.
That is true, barrel divergence issues do occur with higher end guns and they are less frequent. The manufacturer of a higher end firearm is also more likely to fix the problem though I have seen one state being a foot off at 40 yards was "in spec." Even then it wasn't an issue in practice but it was in that person's mind. That is why I used Bruce Buck's comment regarding double guns and have followed it myself.
