5.56mm caseless vulnerability test

Does anyone know how an ammunition “vunerability test” is conducted, or can post the results of one, any one. This box is only the size if a conventional / typical 20 round 5.56x45 or .223 brass cased box & must only hold 20 & not 2000

Pete, he an old discussion on it:

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That was what I was told but wanted to be sure. Thanks Alex