Doc2005... don't plan your program for light clothing, prepare for the worst case scenario; arm yourself for the worst and hope for the least. Count on perps being large, heavily built, thickly muscled, high on drugs, drunk, stoned, cold-blooded, and cold-hearted. Also count on having to land a large number of very well placed hits into the perp before you can even hope for a sudden "stop". You can empty a 1911 magazine in just two or three seconds. So between misses and hopefully some right-on hits, even with one perp, at this point, you may find a 1911 magazine empty or nearly so (especially a Compact magazine) - with NO time to do a reload. You can also count on there being two, three, or more perps acting together. (This is why high capacity is ALWAYS a better choice than lower capacity! That's why I carry a Glock 23 with 14-rounds of hot 180 gr. Gold Dots of forty or a Glock 19 with 16 rounds of 124 gr. +p Gold Dots. Much as I love my many 1911's, I prefer higher capacity.)
In .45 acp, forget the light bullets, unless they're of exotic design (PowRBall & DPX). You want deep penetration above ALL else. 230 gr. will get you that. Your bullets may have to pass through upheld arms, hands, before reaching the torso, then possibly many inches of fat and or muscle before reaching vitals. 230 gr. JHP/ball or exotic (PowRBall or DPX) are the best choices.