Harley's forum has some experts hanging around that should be able to help.
Most Belgians run from OK down to dangerous. More of the latter than the former, unfortunately. I suggest you get a decent smith to check it out.
The good news, if those bbls are real steel with a damascus stencil instead of real Damascus, you may have an occasional shooter as well as a wall hanger. Any reloader can set you up with some low pressure 7/8 oz loads that run about 9K PSI or less. Most of the Continental shotguns I've handled like this had good balance and "Feel".
If it's thumbs down from the smith, hang it up and enjoy.
HTH....
