swan shot as I know it is homemade shot. it varies in size, etc, is bigger than #4 birdshot and smaller than buckshot. from what i understand, it was just used when commercial shot was unavailable. i was taught by an old woodsrunner to just some lead and run it through a hot spaghetti drainer and catch it in a basin of water. we did it off a creekbank, etc, where the shot had time to fall and cool some before striking the water in the basin. not very round. he called it swan shot though.