For most situations, 9 rounds of the ol' four-five should be sufficient. I am of the opinion that a defensive handgun should either supplement a rifle or shotgun, or serve as an emergency backup option. In neither situation is the handgun meant for extended engagement. The advantage of a handgun is its ability to be easily carried and concealed. A handgun can save your life in an emergency, but will never be as well-suited for combat as a long gun.
But what do I know about puny handgun calibers? I won't carry anything less than a .300 Win Mag Encore, because I'm a real man
But what do I know about puny handgun calibers? I won't carry anything less than a .300 Win Mag Encore, because I'm a real man