I'm looking to buy another gun within the next month. Im torn between a .40 cal and 10mm. I do not have either one nor have I ever shot either one. I know that the ammo for the 10mm is more expensive than the .40 cal. Which one is more powerful? I have heard some say its the .40 and others say its the 10mm. Heck i have heard some say the 9mm is more powerful than the .40. With so many different opinions how is one to know who to believe? This is why I like INGO, there is a lot of knowledge here. Hopefully there is more knowledge than ignorance. Just kidding.