Don

If you are going to use that gun, and it has "a little wiggle" between the barrels and action, now is the time to fix it. If it will close tight on a piece of paper, it is off the face. Any further shooting will beat it to death in short order, and at an exponentially increasing rate. The parts have a run at each other now upon firing, and it'll only get worse.

It looks like it will make a nice grouse gun for you.