Do be careful shooting plates with high velocity rounds with heavy bullets. Had a buddy who shot himself in the belt buckle with a 300gr. .375, rebounding from a steel plate shot at about 20 feet. The plate was 1/2" thick. I don't know the alloy, but the 300gr. make a lead splash only, no indentation.
; The hit to the stomach made him sick to his stomach & he plopped down on his butt and vomited. He though he'd killed himself - pretty good blow, too - bend the solid buckle into a dish. This guy is 6'5", 240 pounds and certainly not a 'soft' individual.