Everything in life is balance. To truly feel safe and have the biggest gun, try having someone follow you with a tank, carry a grenade. Rocket launchers are getting cheaper. But in the real world it will be rare to meet an an attacker. I own a Kimber Ultra CDP II. It is a short version of the 1911 . It fires .45 ACP's. I would never try to carry this thing concealed. It is heavy large and bulky. Even the shells are heavy. Given that you need to find a balance of force, concealability and convienience. I find that the Kel Tec 380 with hollow point shells fit the bill just fine. I most likely will never need to use it. So I want something that I can have in my pocket and forget about. Yet still have reasonable force by which to protect myself. You will quickly tire of carrying anything much bigger.