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Firearms training makes the difference in winning in a serious situation.
Unfortunately, there are too many folks who never learn how to "run the gun." Instead, they focus on either caliber or capacity.
In either or two cases, they can't hit the target and an innocent is at risk, or they are stalled in a serious situation because they can't clear a malfunction and resume their defensive operation
Training is cheaper than dumping lead and failing to achieve hitting the target on a consist basis. I invest about $1,000 a year training with professionals.
Two expressions people should consider:
"It's the indian not the arrow." - It's the shooter, not the equipment nor the caliber.
"Practice does not make perfect... it just makes permanent." - Practice proper techniques, don't reinforce a failed process.
I'll bet on a guy engaging a threat with a 7 shot 1911 than a yahoo with a 33 round G17 who can't hit the target, nor clear a malfunction.
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The following videos are instructive and entertaining:
Five shots with a 9mm: http://www.youtube.com/watch?v=w0kwU40huC4
Six shots with a 1911: http://www.youtube.com/watch?v=XQy5yKN-2vw&feature=related
One aspect of "running the gun": http://www.youtube.com/watch?v=BfyULpEhmug
Basics: http://www.youtube.com/watch?v=nM8nwZjaf1Y
Self preservation: http://www.youtube.com/watch?v=tCC1f-_4ztI&feature=related
Honing skills: http://www.youtube.com/watch?v=aVoO_Khb2_k&feature=related