I Shot My Neighbor?

I shoot the 357 Sig even though it is expensive. It has excellent stopping power and good muzzle velocity.

Does anyone know if it is illegal to possess hollow point ammo or have it in my gun in any state, and if so where can I find this information?

I live in a condo and am having a hard time deciding what kind of pistol to use for defending my home. I want to keep any possible danger to my fellow condo owners to an absolute minimum. I certainly do NOT want to end up shooting my neighbor!!

Any ideas or suggestions?