So I'm sitting here at work yesterday idly wondering what I could make some sort of reusable reactive targets out of and my eyes lit upon some old circular saw blades hanging from one of the many pegboards here in the shop (TV engineering).
"Hey... there's an idea"
Has anyone ever shot at one of those? I've got several old 7-1/2" and 10" blades at home. I may take a few to the range next time I go and throw some 9mm at them to see if they shatter, break, shoot back, or do something else undesirable. If they work, I may be on to something.