Question

can a stainless steel stop a 9mm bullet?​

Answer 1

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• It depends on the type of steel, and the hardness more than just the thickness. Some 1/4 inch steel will not stop . 38 special lead, other 1/4 inch steel will stop +P+ 9MM FMJ.

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Answer 2

Answer:

It depends on the type of steel, and the hardness more than just the thickness.

It normally takes between a 1/4 inch to a 1/2 inch of steel or 3/8 inch to 3/4 inch of aluminum to stop a bullet. Something like a metal target needs to be one solid layer, as does an active backstop.