A rather lengthy question and topic to all. I recently purchased two hammer 12 ga Baker guns. Both are a little off face and one has a visible air-gap between the breech and the barrels. The wood is so , so mostly dirt and scratches but no cracks in both guns. My main question is, can someone purchase proof loads for testing and where can these loads be purchased? I want to take these guns behind the barn attached to a cord a lead sled as well as secured to a car tire. If one or both survive the test then they might be worth getting properly repaired for use. I paid $50.00 for both guns.