Any projectiles with significant weight will over penetrate. Take a look at youtube videos (some already here).
Let me add a couple of thoughts to the mix from a somewhat educated keyboard commando (see what I did there).
1. If you are planning on missing and hitting something, don't! Hit what you are aiming at, get some training and practice. It is somewhat of a mindset thing and obviously there is no perfect world just yet, but train, be trained, practice and be proficient, so you greatly reduce your risk of missing and over penetrating.
2. Do your research on over penetration. Pistol rounds and shotgun rounds WILL over penetrate (FYI talking about shotgun slugs and 00 buck, perhaps less so with #4 and so on). Rifle rounds are not the over penetrators (not talking about 50 BMG and other more on the crazy spectrum) that people think. The main thing for over pentration (layers of drywall not body armor) is the weight and energy of the projectile. Hot 5.56 can be very hard to stop for body armor, but less so for building materials etc. Watch the Youtube videos. That said, it can still over penetrate, but not more so than 00 buck, slugs or pistol rounds. (Yes there will be exceptions, so don't flame me on this, just look at some stuff others have done)
3. Be aware of your surroundings, and know when and where you can take a shot. It is part of the 4 universal firearm rules. Be aware of your target and what is behind it (and through it and in the next 5 rooms and the house next to you).
4. Really as part of 3 above, but an angle can make all the difference. What if you lower yourself, so the path of a projectile is now up and away from the short little ones in the room next door? What if you are shooting down from the 2nd floor. Would any projectiles go to the floor? Is there anything you do not want to destroy below the floor?
I know the above thoughts are not magic solutions, but I wanted to add a few thoughts.
Let me add a couple of thoughts to the mix from a somewhat educated keyboard commando (see what I did there).
1. If you are planning on missing and hitting something, don't! Hit what you are aiming at, get some training and practice. It is somewhat of a mindset thing and obviously there is no perfect world just yet, but train, be trained, practice and be proficient, so you greatly reduce your risk of missing and over penetrating.
2. Do your research on over penetration. Pistol rounds and shotgun rounds WILL over penetrate (FYI talking about shotgun slugs and 00 buck, perhaps less so with #4 and so on). Rifle rounds are not the over penetrators (not talking about 50 BMG and other more on the crazy spectrum) that people think. The main thing for over pentration (layers of drywall not body armor) is the weight and energy of the projectile. Hot 5.56 can be very hard to stop for body armor, but less so for building materials etc. Watch the Youtube videos. That said, it can still over penetrate, but not more so than 00 buck, slugs or pistol rounds. (Yes there will be exceptions, so don't flame me on this, just look at some stuff others have done)
3. Be aware of your surroundings, and know when and where you can take a shot. It is part of the 4 universal firearm rules. Be aware of your target and what is behind it (and through it and in the next 5 rooms and the house next to you).
4. Really as part of 3 above, but an angle can make all the difference. What if you lower yourself, so the path of a projectile is now up and away from the short little ones in the room next door? What if you are shooting down from the 2nd floor. Would any projectiles go to the floor? Is there anything you do not want to destroy below the floor?
I know the above thoughts are not magic solutions, but I wanted to add a few thoughts.