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Webleymkv · February 14, 2009, 02:52 PM

Firepower, XM193 5.56x45, 9mm JHP, and .45 ACP JHP will all, according to the Box O' Truth website, penetrate 12 boards of sheetrock which is equivalent to 6 interior walls. The 5.56 rounds, however, began to tumble with the handgun rounds did not. Using ammunition like a 40grn JHP in a 5.56 would likely induce more tumbling and/or expansion and further limit penetration.

February 14, 2009, 02:52 PM	#74
Webleymkv Senior Member Join Date: July 20, 2005 Location: Indiana Posts: 10,446	Firepower, XM193 5.56x45, 9mm JHP, and .45 ACP JHP will all, according to the Box O' Truth website, penetrate 12 boards of sheetrock which is equivalent to 6 interior walls. The 5.56 rounds, however, began to tumble with the handgun rounds did not. Using ammunition like a 40grn JHP in a 5.56 would likely induce more tumbling and/or expansion and further limit penetration.