I bought an vintage remington model 1900 double barrel Damascus steel 12 gauge. The shotgun has been inspected by a gun smith and was given a green light on being safe to shoot. I got a mec jr 12ga reloader when I bought a used reloading setup. I have afew different charge bars that came with. One for turkey loads, one for duck/goose, and one for trap. I understand that this was a blackpowder shell shotgun and that modern loads create too much pressure for the Damascus steel barrels. So what kind of powder and how how much would be recommended to use? Type of Wads? And what size and weight of the shot?