They were mostly used against bunkers and pillboxes, or targets danger close to civilians. While the Copperhead is a bit expensive compared to regular artillery, it's precision is awesome. However, the one drawback to using it is that there has to be a person on the ground to manually target where they want it to hit. I wish the PGMs for the BB class ships had been finished, it might have saved 1 or 2 of them. I consider the capabilities of combining 16" rounds with rocket assist and a PGM tracking package, and it could be used as a much cheaper version of the Tomahawk at 100 mile ranges. And with the pressure from North Korea heating up again, that would have been a perfect weapon to pull out of the arsenal. Steaming an Iowa class ship just outside of National Waters would be as clear of a middle finger as could be sent. Quite literally there is nothing that North Korea could have done against such a ship, short of actually sending a nuke against it. But politicians never think of such things until it is far to late.