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My reference to the 200 was sinly because the first bullet made for the .45 Auto was of 200 grain wieght, the technology and experience of making simple steel core bullets existed at the time {WW2} and the Army had a desire to improve the penetration of the .45 ACP. Later developments certainly improved performance of rounds against hard targets, but Uncle Sam had an easy fix to some degree at his fingertips even back during the Big War, but never tried it.

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