You seem determined to use this , against all the (free) advice you have received on here. Do you drive on bald tires or with faulty brakes? Would you jump into the water with a group of feeding sharks? Would you volunteer for a probably fatal job? Maybe you just ignore good advice regarding possible danger because you thrive on risk. You could possibly shoot this gun for years without incident, or the next shot could be disastrous. You have no way of knowing if the gun will hold together for 10, 25, 250 shots or if the next shot will destroy the gun and possibly leave you crippled or worse. You asked for advice, admitting that your knowledge regarding old shotguns was minimal and then disagree with a consensus of that knowledgeable advice because you "wanna shoot the gun". Yes you are disappointed because you bought a gun to shoot ( hopefully well below market value as well) and now it looks like you made a mistake and you don't want to give up on your dream. If it's that important to you, spend a little more money to get the gun evaluated by a professional gunsmith with solid experience with old double shotguns. Don't take it to Joe the plumber that fixes guns as a sideline or hobby. This gunsmith will give you an honest and accurate assessment of your jewel; his business , both financially and legally depends on his decision. Your gun is 100 years old, made as cheaply as possible and was never proofed or intended for use with modern ammo. Now, because of these factors and considerable abuse and neglect since new it's time to permanently retire it. The proper way to check a gun for looseness is with the forend OFF, hold the gun vertically muzzles up, one hand supporting the butt and the other gripping the action near the trigger guard and shake it. A gun that appears only slightly off face will often be loose as a goose by this method.
Show us some pictures of your refinished / repurposed gun when when you're satisfied with your project.
