A friend of mine molded up some round ball slugs for me with a .724 mold using lead with very high tin content. The slugs weigh 27.3 grams which is incredibly leight! The .715 diameter round ball all lead slugs I have weight 28.5 grams.

These high tin slugs seem very hard as well. They look beautiful but it is quite difficult to dent or scratch them. I am guessing 30% tin??? I don't know for sure but they are so light they have to have a high percentage of tin verses LEAD.

I am reluctant to shoot these out of my .724 smooth bore shotgun because I am concerned about scratching the barrels.

Is this a valid concern, do you think?