Local law enforcement around here use AR type Carbines and 5.56 Speer Gold Dots. If I were to use a 5.56 AR for home defense, I would start there. (1) Someone performed some sort of at least cursory examination of options avalible. (2) Not being an expert, you put your trust in the product used by your local contabulary. Should be difficult for an ADA to second guess.
I corresponded with an expert on terminal performance, Dr. GK Roberts. According to the tests he performed, frangible ammo is not good for self defense. Doc's tests also show that birdshot is a poor choice and #4 buckshot as a minimum.
goodoboy, I'm starting to feel like I'm casting pearls before swine. It's your money, it's your life. I've given a few fish and tried to point you in a direction to learn to fish for yourself. Read the following-
http://www.mlefiaa.org/files/ERPR/Terminal_Ballistic_Performance.pdf
Let your wife shoot the AR. Then let her shoot the shotgun and see which she prefers. I bet you a box of bullets, or shells, she'll prefer the recoil of the AR.
Thanks for the help.
Just to be clear I understand. The cops use AR15 with 5.56 Speer Gold Dots?
The must buy this ammo because they know if they miss the target and bullet goes through sheetrock or wood, the bullet most likely not penetrate other walls.
Thanks C J,
Do you have video proof this with dry walls?
Need some help with terminology.
Hornadyle.com - 55 gr. TAP URBAN(R)
1. What does "when the probability for barrier penetration is low" mean?
"Barrier" in this case and the one below refers to what's called 'chance barricades'. Interior walls, doors, glass, auto glass & sheet metal, plywood and limbs of the body. And "yes" to less chance of exiting the body.
2. What does " prevents over penetration on non-barrier engagement mean? Does this mean less change of bullet exiting the body?
Collateral risk means innocent people are around.3. What does " this bullet a great choice when collateral risk is high." mean?
Means goes through the barriers explained in questions 1 & 2 and will still expand as designed. Note: the barriers in question are those used in the FBI ammo tests. These include auto glass, 3/4 inch plywood and a simulated auto body metal panel.4. What does barrier penetration mean?
5. Best Choices for Self Defense Ammo On this link, what does "If barrier penetration is NOT an important factor AND your rifle can stabilize them" mean? and what does "If barrier penetration IS an important factor" mean?
This video shows the different characteristics of a 5.56, a 9mm, and buckshot. While the 5.56 penetrates "slightly" more than the 9mm and the buckshot it does a lot more damage in the first few walls which means it will do a lot more damage to tissue. Note the 9mm did not expand. The shotgun did more damage and I did formerly use a 12 ga. for home defense there are a couple of things that matter a lot IMO.
First the noise of a 5.56 is not going to be as loud as a 12 ga. which means you might actually get to keep your hearing "if" you have enough sense to be wearing very effective hearing protection in your house. There are ear muffs that actually amplify all noise except gun shot noise. I keep them right beside my gun. You will wish you had something if you fire a gun indoors, believe me. The 9mm will not be as effective at stopping an intruder as a 5.56. Plus you most likely have more of a problem with ricochets with a 9mm due to the fact they don't fragment like a 5.56 round.
Also I believe drywall is a very poor medium to test over penetration. It is very soft and fragile compared to the bricks on the outside of your home and whatever might possibly be on the house next door. Tests need to be done with bricks or other material where results may be very different. I found another video where a brick wall was simulated. Both the 9mm and the 5.56 failed to penetrate the brick wall. The 12 ga. with buckshot destroyed the wall and clearly went beyond but the test didn't show how much beyond. Still that was the only test I've ever seen where they used a brick wall simulation. I include a link to that test. I will say I think the buckshot they used was extremely powerful. It has a 1600 fps speed while most buckshot is under 1300 fps.
In my particular situation I have a safe room and a zone where firing is going to be very safe compared to firing in a house very close to another house. My house is built back into a hill so that the back of the house is surrounded by dirt. And the structure behind the walls is not just a stud wall with drywall. It's 12 inch concrete blocks and behind that is a big wall of dirt. The only way a bullet would escape would be to ricochet (which slows it down) and then penetrate my front wall which has a stone exterior. And the nearest house in the line of sight is about 250 yards away. It just isn't likely for me.
A 5.56 has other advantages over a shotgun. It holds 30 rounds over the 6 my shotgun holds and even with the ammo in a sidesaddle holder that only gives me 11 rounds. That certainly would likely be enough. But there's also the recoil. My wife can fire the AR with no problems. She isn't likely to do nearly as well with a 12 ga. using buckshot.
There is a lot to be said for a shotgun. And I do have shotguns. I also keep a .45 near where I sleep because it's easier to get access to it. But it will be used to defend my movement toward my AR. I have a bright light mounted on the AR also which should blind any attacker. But you never know when a truly psychotic person might attack you whether from natural causes or drug induced. People can be very hard to stop when they aren't aware they are being hurt. I once shot a rabid fox 8 times in yhr head at point blank range with a .22 and it walked away. I was literally using the barrel of the gun to keep it away from me and I had the barrel about an inch from it's head. I shot it twice more with a 20 ga. shotgun and it didn't even flinch much less die. Finally a 12 ga. killed it. I want something I can be sure will disable a person in a mental state close to that of the rabid fox. A sensible person will withdraw at the first shot. A crazy person is liable to do anything and both me and my wife need to be able to keep shooting until the job is done.
Here's the video of the drywall test I mentioned before.
5.56, 12 gauge, and 9mm vs drywall in slow motion - YouTube
Here's the video of the brick wall test.
9mm vs AR 15 vs 12 Gauge... Brick Wall House Test - YouTube
Thank you for the details. I want to be sure I thourghly understand barrier terminology so I can make good decisions and teach my family. I wasn't raised with guns.Collateral risk means innocent people are around.
Means goes through the barriers explained in questions 1 & 2 and will still expand as designed. Note: the barriers in question are those used in the FBI ammo tests. These include auto glass, 3/4 inch plywood and a simulated auto body metal panel.
Stabilize means the rifling twist in your rifle will rotate the bullet at a rate that allows the bullet to fly straight. A rifling twist too slow for the length/weight of the bullet will result in the bullet tumbling in as little as 25 yards. Where it's gonna land is a guess. 1-9 rifling twist will stabilize the Horanaday 75 gr HPBT match bullet, it will NOT stabilize the A-Max version of the same bullet weight. Hornaday went to plastic tipped bullets in their current law enforcement ammunition. No idea if 1-9 twist will stabilize them (at 75 grains, 55 should be no problem). The plain HPBT is still available in another ammunition line.
If barrier penetration is not an issue suggests the bullet is not designed to penetrate barriers without degradation of performance.
Barrier blind is ammo you can use to shoot through the barriers and still effectively perform as designed.
DUDE! You're way overthinking this. Ain't no 5.56 ammo you're gonna find isn't gonna go through daywall. Even two complete walls (4 sheets drywall). NONE (that's not military specialty ammo) of it is gonna go through a brick.
Tests routinely show even turkey shot at in home ranges penetrating up to 11 pieces of drywall.I respect your desire to be adequately armed in the event of a home intrusion. You will probably garner as many opinions on this topic as there are forum members.
I too wrestled with the issue of over-penetration because I and my neighbors live in wood-frame houses. I own both an AR-15 and an M1-carbine, neither of which I consider suitable for home defense with so many innocents in close proximity. I feel fully protected with either a 9mm or .45 ACP at my bedside. However, I have studied my lanes of fire and I know in which directions I can't fire. If you go with the AR-15, consider an explosive varmint load which expands quickly and violently.
Often overlooked in a home defense scenario is the shotgun loaded with #4 buck. These pellets, each .22 caliber, are far less likely to penetrate several layers of home construction to reach neighbors. Even #4 shot, a turkey load, is super deadly at very close range and even less likely than #4 buck to cause havoc outside the home. I would avoid rifled slugs, "O" and "OO" buck in a suburban environment.
I'm not a lawyer but I think that if a bullet left your home to strike an innocent, you would not be charged with murder. Police officers have killed hundreds of bystanders over the years and are not charged.
I just don't agree. Tests show more than enough tissue damage and penetration.The light varmint bullets in .223/5.56 mm (40-50 gr) that do so well in limiting penetration also present problems when dealing with attackers who are on the large side. Also if you have to shoot through chance obstacles like an arm. Most of those who use the cartridge seriously have gone up in bullet weight and work hard on not missing. We're talking a range of feet generally.
This, is really what it comes down to. Misses will penetrate walls. Though I will say, typical handgun rounds, even HP rounds are going to do a lot more of that then a 40gr Varmint round in a 223/5/56 carbine. What can yu make those hits with. Versatility of the handgun, only comes into play for most, imho, us when clearing a home. But, if you're holing up in a back room, as OP's plan, it comes down to more, what can you guarantee you can make more than one hit on the bad guy(s).While I agree that the handgun is the most versatile choice, I've done some handgun drills with a carbine. Most folks will do those drills faster and with better shot placement with the carbine. HOWEVER, at really close range the handgun is a better choice.
Thank you for the details. I want to be sure I thourghly understand barrier terminology so I can make good decisions and teach my family. I wasn't raised with guns.
Just to be sure I understand.
Low Barrier penetration means the bullet has low chance of exiting the body, wood, limb, wall, etc?
What's is non barriers?
Posted this before, but I think it's good to repost. More of a real word type of test. Not the scientific tests that a lot of people like to cite. A real house was used.
What's Best for Home Defense: AR, AK, or Pistol? - YouTube
This is why, in my humble opinion, a shotgun is much better for home defense for the typical person , I am now researching what ammo for a 12 gauge mossberg 18 will not penetrate multiple walls if I miss from about 5-8 yards. So far my, I see 7.5 birdshot will work. I need to see now if #4 buckshot will travel through multiple walls.
In other words, if someone ask me what to use for home defense, from my current knowledge and simplicity, use a shotgun. What ammo with shotgun, depends on your living arrangement and how many walls if you miss. Get birdshot ammo.
Thanks cyphertext for response and video.Problem is, if you follow your own advice, your humble opinion is likely to get you killed... and your current knowledge is at a very low level.
Anything that is going to penetrate deep enough to hit vitals is going to go through sheetrock... and multiple pieces. You have to hit vitals to stop a threat.
Watch this video and tell me that a shotgun with birdshot is a good idea... You can fast forward to about the 1:10 mark to see the part that is applicable.
Brave Student Stops Active Shooter on Campus | Active Self Protection - YouTube
DO NOT USE BIRDSHOT IN YOUR SELF DEFENSE SHOTGUN! IT HAS POOR TERMINAL PERFORMANCE AGAINST HUMANS!