I'm a big fan of lasers. For pistol rails, the Lasermax rail laser with a rail on the bottom so you can mount a light, is pretty cute. If you have an appropriate guide rod arrangement, the guide rod laser is as close to perfect and unobtrusive as you could ask.
I think a laser is a valuable tool for training, ( really shows hand wobble ) and low light. Requires some thought, and hopefully training, as does light use.
deep cleaning an ar is a huge pain in the a! takes me longer than any others by far. the lwrc piston gun was a pleasure though. wipe the bolt down, lube, done
5.56mm 200 Yard Steel & Ballistic Gel Penetration Published on Dec 2, 2012 by tnoutdoors9
Using a 16" barrel AR15, shooting the 5.56mm NATO M193 55 gr FMJ at 200 yards. Primary objective is hitting a 1/4" steel plate at 200 yards and getting a pass through and into ballistic gel.
Ammo is military surplus 5.56mm, Lake City 2005 production date. Rifle is a Bushmaster lower receiver, Rock River Arms upper with 16" barrel, 1:9 twist. I'm using an EoTech 516, no magnification.
Lot of considerations to take into account when thinking of a long gun for HD. Same for Shotguns & Pistols too. Lot of information available as well on the intrawebs.
Having said all of that, there is a reason the M4A1 replaced the MP5 as the preferred CQB weapon. Do your own research & make an educated decision.
Quite frankly there are way too many options and way too many variables when it comes to home defense ammo. I have literally driven myself mad researching to trying to figure out the best option for me. For home defense most recommend a good JHP but they can get very pricey. Personally I think the Winchester PDX1 is a good choice but that stuff is very expensive.
Personally I think the Winchester PDX1 is a good choice but that stuff is very expensive.
2 fail to fire out of a 20 round box tells me not to trust it. 2 different Colt 6920 LE models, different magazines, 10 rounds in each. 1 fail to fire out of each rifle, somewhere in the middle of the stack. Dented the crap out of the next round as well the first time.
For h.d. a box of good hollow points will last you forever(hopefully) so price does not matter. Just make sure they feed through your gun and your good to go.
Here's a question for those much more knowledgeable than me ... if you AR is chambered to shoot both 5.56 or .223, which is the better ammunition to use. .223 is more available but I think the 5.56 rounds are more powerful. Is that correct?
Same here with WWB through my XDm, only the very rare fail to fire/feed, probably 3-4k+ rounds (at least) through it so far, I kinda lost track. Between WWB and Federal, it's an even toss up.
I'm still on the learning curve for the AR, but the 5.56 develops a higher chamber pressure which can cause problems with a rifle stamped .223 only. You're have to do your own testing to find out which ammo works best with your rifle, some shoot better with 55 grain, some with 62 and others with 75 grain, just depends on a lot of different variables like barrel twist, length, etc.
I'd hit up an AR specific forum for better info, there's plenty out there.
Really thinking about one to play with. No plans to use it for self defense or hunting, just range play. And not to mention you can get 500 rounds for $25!!
The difference between .223 and 5.56x45 is in case thickness, subtle stuff, the neck in particular, so you get higher chamber pressures. But not more performance.
In the end, the 5.56 chamber has more freebore between the neck of the cartridge itself and the beginning of the rifling.
The 5.56 case has thicker walls to handle higher pressures, meaning the interior volume of the case is smaller than that of a .223. This will alter the loading data used when reloading 5.56 brass to .223 specs.
and
The significant difference between the .223 Rem and 5.56 NATO lies in the rifles, rather than the cartridges themselves. Both the .223 and 5.56 rounds will chamber in rifles designed for either cartridge, but the critical component, leade, will be different in each rifle.
The leade is the area of the barrel in front of the chamber prior to where the rifling begins. This is where the loaded bullet is located when a cartridge is chambered. The leade is frequently called the “throat.”
On a .223 Remington spec rifle, the leade will be 0.085”. This is the standard described by the Sporting Arms and Ammunition Manufacturers’ Institute, Inc. (SAAMI). The leade in a 5.56 NATO spec rifle is 0.162”, or almost double the leade of the .223 rifle.
A shorter leade in a SAAMI spec rifle creates a situation where the bullet in a 5.56 NATO round, when chambered, can contact the rifling prior to being fired. By having contact with the rifling prematurely (at the moment of firing), chamber pressure can be dramatically increased, creating the danger of a ruptured case or other cartridge/gun failure.
The reverse situation, a .223 Rem round in a 5.56 NATO gun, isn’t dangerous. The leade is longer, so a slight loss in velocity and accuracy may be experienced, but there is not a danger of increased pressures and subsequent catastrophic failure.
How serious is the danger of firing 5.56 ammo in .223 guns? Dangerous enough that the SAAMI lists 5.56 military ammo as being not for use in .223 firearms in the technical data sheet titled “Unsafe Firearm-Ammunition Combinations.”
ATK, the parent company of ammunition manufacturers Federal Cartridge Company and Speer, published a bulletin entitled “The Difference Between 223 Rem and 5.56 Military Cartridges.” In this bulletin, ATK stated using 5.56 ammo in a .223 rifle could result in “…primer pocket gas leaks, blown cartridge case heads, and gun functioning issues.”
However, the danger may be lower than SAAMI or ATK suggest. In Technical Note #74 from ArmaLite, the company states “millions of rounds of NATO ammunition have been fired safely in Eagle Arms and ArmaLite’s® SAAMI chambers over the past 22 years,” and they have not had any catastrophic failures.
According to ArmaLite:
“Occasionally a non-standard round (of generally imported) ammunition will fit too tightly in the leade, and resistance to early bullet movement can cause elevated chamber pressures. These pressures are revealed by overly flattened primers or by powder stains around the primer that reveal leaking gasses.”
What Do You Have?
So, if you own a rifle chambered for the .223 for 5.56, do you know for which caliber it is really chambered?
Many match rifles are chambered in .223 Remington (SAAMI specs) for tighter tolerances, and theoretically better accuracy.
Many of the AR-15’s currently sold on the market are made for the 5.56 NATO cartridge. If you own one of these, you should be fine with any .223 or 5.56 ammunition.
However, ATK dropped this bomb in the bulletin on the .223/5.56:
“It is our understanding that commercially available AR15’s and M16’s – although some are stamped 5.56 Rem on the receiver – are manufactured with .223 chambers.”
So, even if your AR is stamped 5.56, is it really? Check your owner’s manual or call the company directly and make sure you get an answer you feel comfortable with.
As if the confusion regarding the .223 vs 5.56 chambers wasn’t enough, there is a third possibility in the mix, that is being used by at least one major manufacturer. The .223 Wylde chamber is a modified SAAMI-spec .223 chamber that allows for the safe use of 5.56 NATO rounds, but maintains tighter tolerances for better accuracy.
Yeah, yeah… What’s the bottom line?
Here’s the bottom line. If you want to follow the safest possible course, always shoot .223 Remington ammunition. The .223 Rem cartridge will safely shoot in any rifle chambered for the .223 or 5.56.
If you want to shoot 5.56 NATO rounds, make sure you have a rifle designed for the 5.56 military cartridge. Shooting 5.56 in a normal .223 Rem rifle can result in bad things.
In other words, if buying new and have the choice, get the 5.56 or Wylde chambers. If not, don't worry too much about it, unless you are shooting "surplus" ammo.
RE: FMJ vs. hollowpoints/polymer tipped hollow points/softpoint ammo.
FMJ is required by treaty if you are in the military. It's better at poking holes in hard stuff, which makes it crappier for hurting bystanders as it goes sailing through the hard stuff that is your home. Use it for practice ( not on steel plates ) barrier situations,(shooting up cars, battling the minions Of Umbrella Corp ) or for fur bearing game where you want to minimize pelt damage.
Expanding bullets, ( hp/poly/sp ) are better on game, by far, with performance varying a LOT depending on construction and velocity.
The Box-o-truth guys got tired of anecdotes ( often conflicting ) and no real data. So they did some experimenting. And had fun. Check out the Buick of truth too.
There's also some real good pics of ballistic gel testing out there. The consensus seems to be you want about 12"+ of penetration, and as big a hole as you can get to let the angry out faster. If you look, ( too lazy to do so now ) there are even comparisons on ballistic gel & game, but some of the pics will upset those squeamish about butchery or hunting. So unless asked I won't post a link. ( I find that EMT's and others who work in trauma medicine are a little scary to normal folk,when it comes to matter of fact-ness about the squishy stuff we're made of and how it gets broken. YMMV )
Basically, the 5.56 case walls are thicker, ie higher internal pressure. The throat, or distance from the tip of the bullet to the chamber, is roughly twice as long on the 5.56 Nato as the .223. This means the 5.56 round will always chamber .223, but have excess space between the bullet and chamber/rifling, but a .223 could potentially ram the 5.56 Nato into the chamber/rifling because of the longer throat.
Its a bit tarnished, we've lost a touch of innocence we had in August of 2001, and gained a measure of ( very rational ) cynicism in the last 6 years, but you can still buy a gun, date a girl, and drink a beer.
You can also put salt on french fries, pick your own doctor, live where you chose, worship as you will, and buy premium gasoline.
Who knows what on the above list will be forbidden next year or next decade?
Enjoy it while it lasts. This smells like 1938 to me. In so many ways. ( but people who know a little history always think there's a pendulum, a pattern, and we're going to heck in a handbasket. People who don;t know some history are constantly surprised, and often killed. )
Posted on Wednesday, December 05, 2012 - 12:54 am:
Anything that makes an effective self-defense load will go through a lot of building materials. 5.56 also fragments when hitting soft materials (with enough velocity).
Some ammo comparisons:
The main thing is to hit what you're shooting and know what is behind the target.