Ok so I have 2 firearms I'll consider using for home defense. I have an XD45 and the XCR of course. My general consensus from the forum is that the 5.56 round is reliable to 'tumble' or fragment apart provided the proper velocity; one way to eliminate that problem all together is using hollow points. Now for my question. What 5.56 round is good for home defense? Quite often I hear people talking about using a pistol or shotgun for defense but the wife isn't all that comfortable with the pistol and for personal reasons doesn't want me to have a shotgun. She however loves the XCR almost as much as I do so I want her to be comfortable and safe with it. If I can get some feedback with ammunition to use it would be much appreciated.