In a recent argument with a relative, the effective stopping power of a .223 and a .45 acp were debated. .223- appox. 55gr spitzer ballistic tip @ 3500fps vs. .45- 200 gr. JHP @ 800 fps. Range is close combat. In essence would you prefer bieng shot by a 45 or an ar15 if you wished to return fire. Please choose the lesser of two evils.