We have a Prussian Needle Gun that came into the store and before we put it up for sale, there are a few of us who would like to fire it (Just so we can say that we have). Is there anyone out there who can help us located information on creating rounds for this rifle, Bullet weights, powder charge ect. What would be more ideal is if someone out there had loaded ammo (For its age they would have to be more recent loads) that they would be willing to sell.