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Hello, Andyaux. Years ago, I made up some steel targets for long-range rifle shooting. Made one 1" thick, others were 3/4" The 3/4" ones were plenty thick enough. These were cut-offs from 6" cold-rolled steel bars. I had them pack-hardened to a depth of .060" At 300 yds, a .30-06 full metal jacket..not armor piercing, just put a little dimple in surface. I had eye bolts threaded in sides & hung from twine..Here's the strange part..1st. shot, target goes flying, when examined, eye-bolt bent double around twine BEFORE twine broke! Now thats some force! I had to use carbide & drill two holes in face near top & hang from chains.
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