Welcome to the forums Glen Meyer..
Going to pointificate on tactical sitiations here as well? Go back to Glock talk..you have already stated numerous time you would not engage that would be terrorist, and turn tail, so why bother even talking about the tactics involved in a fight...
Only law enforcement throws away mags, because there is little chance that they will encounter a serious, ongoing firefight, 4 mags should do it.
For the civilian carrying a 7+1 Warthog, 1911, or even only one extra mag, a tactical reload, with or without retention is a must..