Tonight was very scary for me. I had my first accidental discharge in my life.. I remember a guy who helped introduce me to firearms warned me that you will have one of these in your life and I shunned it thinking: "oh no, NOT ME!" Well, now I am smacking my head against the wall and I feel thankful to be alive, although I am abit deaf, but my hearing is recovering. I was taking my AR-15s out of the safe and going to put them next to my bed, as I do at night. Well, I was pulling out my first AR and then took out my second. I switched the AR from my first rifle to the other rifle that had my AIMPoint site. I always check my guns to see if they are loaded and I know all firearms rae loaded. Doing all the multiple safety checks I did, perhaps saved my life. Here is where I was stupid; I checked the chamber and it was empty. AH, ok I felt safe, then I closed the charging handle which loaded the round. For some reason, my stupid brain was not thinking when you close charging handle, that chambers the round. Even though I know this on an average day, today my stupid brain was not registering that. Anyhow, I was confident the gun was unloaded, but I always do a test fire in a safe direction, which was the ceiling of my garage in this case, then I just did a test fire to make sure it was truly empty and BOOOOOOOM. My ears are ringing and I am freaked out to death, wondering what I have done???? I cannot even go into what fear I had after this. The bullet made a small entrance into the drywall ceiling of hte garage and is not noticeable. My heart was racing and pounding and I was afraid to see where it travelled. I feared when I went upstairs that my computer, light bulbs, electrical wires, etc could have been blown to pieces and parts laying everywhere. Well, PRaise God (or whatever higher power you believe), it turns out the bullet went through the floor of my exercise room. It pierced through carpet that had no furntirue or anything on it and kept travelling at about a 30-45 degree angle (the angle I shot the gun at) to the roof. IT appears the round began to fragment when it went through the floor of my upstairs exercise room and pierced through the drywall ceiling of my upstairs roof in what I can describe is a buckshot like-manner. The round I fired was a Hornady .223 TAP LE type ammo with the red ballistic tip. I am happy it was this round, rather than FMJ, as I couldn't tell how far a FMJ would travel, but I was told the TAP type ammo expands and loses velocity quick on impact. I hate msyelf truly and have learned one of the most valuable lessons in my life today. The words of that gunsmith who helped introduce me to firearms has haunted me this day. For all of you, who think, cannot happen to you, IT CAN. I have learned a lesson.. I will never be so complacent again.. This will haunt me for years to come, even though I am lucky,. I pointed the gun in a direction, when I did my testfire, that I knew there would be no civilians at close range or through walls; however, there is no guarantees when something like this happens. Well, now I have a small hole in my floor and about 12 holes in my ceiling that range from 1/10 - 1/2 inch . I am going to have to see what I can do to repair it. For various reasons, I am not sure if I feel safe to call a handyman or not to repair this. I am not very handy in these regards and don't think I could do a good enough job fixing up the damage to make it unknown from my landlord. Can anyone give me any suggestions in this regard? Thank you.