No desire to hurt your feelings but, Cammy7s, that old girl has seen better days. The "Bubba" job on the back of the receiver doesn't give one a warm, fuzzy feeling at all. When you shot it, did you find that the firing pin got stuck in the shell primer when opening the action? In the one image, you can see both firing pins extending well beyond the fence. This means both firing pin return springs are broken or worn out. With the Bubba job on the receiver, it's doubtful you can get in to replace them.
Most often this situation eventually results in pierced primers (sometimes with attendant high pressure gas leaks at the breech). It often allows the firing pin to get stuck in the shell primer after firing and this, in turn makes the action hard (or almost impossible) to open.
But it's the bailing wire and binder twine approach to securing the receiver and the badly damaged screw heads that concern me most. If that's what we can see from the outside, I shudder to think what's on the inside (besides the parts we know are pooched). I'm a huge fan of vintage shotguns and I buy them to shoot, not to look at. Still, I wouldn't shoot that particular gun, if I were you.