Rollo - I know of at least 3 civilian incidents where 5 shots were not enough.
1. Father emptied his revolver into a thug (who was armed with a shotgun) who forced his way into their truck. Fight continued hand-to-hand outside - father got the shotgun away from the thug and killed him with it. The father lost a kid in the fight...killed by one of the father's bullets.
2. Disabled man fires almost his whole mag into a huge bodybuilder thug who was on top of a police officer, trying to get the officer's pistol. The fight was only ended by a shot to the head at a distance of 3 feet. More than 5 shots were fired.
3. Defender armed with a .45 1911 emptied his pistol into an attacker (drunk neighbor) armed with a shotgun. All shots hit. Attacker only retreats when his shotgun jams, and he cannot clear it. He walks home (!) and is arrested.
I don't have faith in 5 shots out of anything that can be fired with only one hand.
You can perhaps argue "shot placement" in scenarios 1 & 2, but that is the point. In the real world, you (and I) may miss some times.

And a hit may not hit a vital area.
If you are going to stick with the revolver, for God's sake...at least carry a back-up, even if it is "just" a LCP in your pocket. Then your Rugers can keep each other company.
One more thing - I would recommend you get the baby Glock in your caliber of choice. If you don't like the 9mm, you can get the .40, or .357 Sig, or even the oft-overlooked .45 GAP. You can always put in a larger mag and a longer barrel for HD duty if you wish. You can make the baby Glocks bigger, but you cannot make the bigger ones smaller.
