I recently inherited from my father a Savage Fox Model B shotgun that was manufactured in the early 1960's. Nothing fancy about the gun or its monetary value but it holds many special memories in the field with my Dad. Is it safe to shoot steel shot through this gun? The reason I am asking is most of the areas that I upland hunt require the use of non-toxic ammo. For folks out there with the older double barrel shotguns what type of non-toxic ammo do you shoot and the best success with? Thank you for any assistance.