What is the best ammo for your firearm?

Best Ammo for Firearm Hero Image

Does your gun function better with a certain brand of ammo?
Have you had repeated failures to fire (FTF) or failures to eject (FTE) with a certain type of ammunition?
Did you just buy a new firearm and simply want to know what ammunition others recommend?
You found the right place: This is the internet's authoritative resource for ammo recommendations for your firearm