A couple days ago, Uncle stated he was wanting to get a 1911 from STI and asked for opinions on which caliber he should order it in. He got lots of answers and stirred up the .45 ACP vs 40 S&W vs 9mm stinkpot.
Master of all Ballistic Knoweledge, Joe Huffman, pointed to this discussion whereupon the following knowledge was given
If during the time you were reading the latest “stopping power” article you were instead practicing to save your life you would be far, far ahead.
Greg Hamilton May 08, 1998
Many, many more tidbits of proper attitude towards energy and numbers are dispensed within that link.