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I have some steel core ammunition in a tin.
Old Russian AK rounds. Came in a tin like SPAM would. Steel core with a copper cladding.
My son, who is in the Army, has steel tipped M855 ammunition for his AR.
I have machined soft steel rounds for 50 Caliber BMG. Long range target shooting. After machining, the rounds were put in the oven and stress relieved to make them dead soft.
I have cast bronze bullets for 45 ACP to meet minimum energy requirements for IPSC shooting. My cousin had a race gun tuned to provide minimum energy and thus almost no kick for speed shooting.
Lead is simply cheap and effective for most shooting requirements. Everything else must match the cost with the application.
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