Ok, I recently had an Ithaca 20 gauge shotgun handed down to me from my great grandad. My understanding is it hasn't been fired in some time. I'm going to get it nice and clean but am weary on taking it for some range time. After researching my weapon, I discovered it was produced in 1937. Does anyone have experience firing older guns? What suggestions and precautions do you have for me if I do decide to take it to the range?