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Message: <blockquote data-quote="Koolhandlinc" data-source="post: 777950" data-attributes="member: 2602">Notice in the picture the 3rd from left is 45auto and the following statement that 45 acp is 45automatic colt pistol. Thus the 45 auto and acp being interchangeable and so the 3rd from left is 45acp. 45 super is not the same and has higher pressure. That equals not good for standard 45acp and should not be used in a 1911 style pistol due to the unsupported area in the chamber.Wikipedia tells about most every round you can think of if you google them. Reading about the 45 super seems to be basically a +P+ type round. 1300 fps or so.</blockquote>