The metal target's composition depends on the bullet composition . I still have a set of 5 targets made from 1 X 2 al. barstock. They were 5 in long and were cut to look like a rat in profile .
This was shot at 33 feet on the same steel tables used for bowling pin shoots. The course was timed for all 5 rats to clear the table. I was using either a High Standard Citation, or a Victor from a holster. K Mart supplied the ammunition CHEEP .
The targets were best hit solid as if the rat wound up laying on end,
1 X 2 makes a smallish target for fast shooting . This course was for my own pleasure and was called - are you ready ?The 10 Meter Combat Rat Course.
I wore Good tinted lens safety glasses for eye protection. Necco Wafers and Ritz Crackers make good targets and are bio degradable.
ROBB