- tain full force of any high explosive upon armor ticulars of construction and ballistic data, as obtained plate or other strong structures (that is, to utilize at recent proof firing at the Bethlehem Proving energy in doing disruptive work) it is necessary that Grounds, Reading, Pennsylvania.… … BREECH-BLOCK WITHDRAWN. with about 20,000 pounds maximum chamber pressure plosive out of the gun gently, for desensitized gun- BEAB VIEW OF TARGET CONSISTING OF 10 INCH PLATE BACKED BY XHE TARGET AFTER BEING STRUCK BY GATHMANN 12-INCH SHELL, CONTAINING 800 POUNDS 07 WET GUHC0TTON. 180 TONS OF…
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