Actually the box does not say ".45 ACP" it says "45 Auto". There are several different kinds of .45 ammo out there so I can understand the confusion for a new pistol owner. Still, there was no need for a new thread on the same topic.
Tomorrow is the most important thing in life. Comes into us at midnight very clean. It's perfect when it arrives and it puts itself in our hands. It hopes we've learned something from yesterday.