Shooting homemade DIY glass bullets from a shotgun can be quite interesting.
This video shows the beauty of targets hit by hand-blown glass bullets.
Test firing some homemade Pyrex (borosilicate) glass shotgun slugs in this video proves to be an interesting experiment.
These shotgun slugs were glued to their waddings and this kept the slugs from falling out of the shotgun shells. Firing these shells from a shotgun against different targets proves to be quite interesting.
A metal door proved no match for the glass slugs. It was pretty awesome to see how it works against a watermelon and a glass table top too.