First off, you need to buy a couple of hundred rounds of basic FMJ ammo to run your pistol until it is well broken in and can be declared reliable with it.
Then you need to buy a another hundred or two of your chosen self defense hollow point to make sure your pistol will reliably digest it. To make sure the bullet's profile and your gun's feeding geometry play well with each other.
Once all that is good and happy, you are set stake your life on it.