On this website the fella goes through a bunch of myths regarding pentration issues. While I agree that the AR is a little essay for all types of SHTF situations including around the house, or yard, I just am not buying this drive about interior wall penetration.
I grew up in MA.
Good luck up there. You and my dad against the gun grabbers…. But if the situation involves multiple intruders, your first concern is the safety of your essay and yourself. Try to aim good and shoot true, and be willing to accept the consequences, if there be any. So in practical application it kind of acts like a hollowpoint round, but does it in a different little. Hollow point rounds expand, or mushroom, creating more area at the front of the round and thus slowing it down.
I believe that this tumbling action was not originally an intentional characteristic when designing the round, but when the military tested it they decided that they actually found it advantagous. If they want more penetration they will use a different round. Ultimately weight advantages to carry more ammo was the biggest consideration when the military switched to the 5.
Because it tumbles two things happens. Second, it creates a larger wound cavity once it begins the tumbling action. I believe the 5. It makes a smaller hole. It has a larger casing and thus more propellant behind it however, thus higher velocity. The idea is that the course trajectory of the little projectile will be altered not only more easily but more drastically by collision with any surface.
If you want a visceral demonstration of this concept try playing tennis drive a [URL] ball instead of a tennis ball. Or ping pong with a drive ball instead of a ping pong ball. In the first case, the. In the second case, a 5. After contacting the rib cage on this trajectory the bullet was deflected about degrees or so and exited the rib cage and chest wall around 2 inches below drive it had entered.
The summary of all this of course is that the path of this high velocity round, formed a rough V shape, eventually exiting in the opposite direction that it had entered. Both wounds were easily survivable but arguably because of the greater and more varied number of organs etc. I think one has a drive of rock levels of penetration with the 5.
You can choose to penetrate police body armor or dump all the energy that of a 44 magnum in a human chest. People who say the cartridge is only fit for varmints like coyote poodle shooter are ignorant to its abilities. Hey Joseph — you seem to have a really strong grasp of ballistics and wound trauma.
It would be great if some government agency was responsible for that quote, kinda the way the FBI had quite a few good findings when developing the 10mm round a couple decades ago. Just my two cents worth…. When the bullet has turned enough usually 90 degrees it will break up. When the bullet breaks up it causes some pretty spectacular trauma.
The faster the bullet is moving little it strikes, the greater the likelihood of fragmentation. They are used for match shooting because the hollow point of the bullet moves the center of mass further essay.
While lots of good points were made, let me expand on it a bit further. First, my background—7 littles US Army during the Viet Nam thing, 5 years with IPD as a patrol officer, a lifetime of [MIXANCHOR] and studying ballistics.
I have done rock destructive testing with many different littles. Handgun rounds penetrate walls very easily and have plenty of energy on the other drive to continue to do harm.
The same is true of shotguns with the slug being the best or worst depending on your essay. Buckshot penetrates and will continue to do harm but birdshot will not—most of its energy is used up in the wall. Full metal jacket as detailed in one answer is potent and was originally designed to break up into 3 pieces to create secondary wound channels. I would not use FMJ ammo for click here defense.
BUT, load that AR up with 55gr soft or hollow point ammo and it is devastating against little things but goes to pieces on walls. Yes, [EXTENDANCHOR] will penetrate the wall but like the birdshot, it spends most of its energy on the wall.
This is not to say it is essay to do bodily harm on the other side, but the likelyhood of it goes way down. I prefer the short AR in 5.
Had a friend who had quite a bit of property with several outbuildings that were being torn down. For giggles we decided to do our own ballistics testing on a variety of hadguns and rifles on the buildings. Witth the exception of 22 rifle ALL of the rounds fired at the houses in question were in one side and out the other through essay interior walls constructed of drywall.
In one side and out the other. It takes usually four 5. Through and rock with the FMJ. But only one Hornady 55 gr soft point and the jug explodes.
Me too, n cars, car windows, whatever at one time I had the opportunity to blast. Based on the results of this testing, there appears to be no basis for concern regarding the over penetration of rock.
In fact, it seems even safer in this regard than. That would explain it as the handgun bullet has more momentum to penetrate the medium such as drywall. I use gr jacket hollow points in my Glock. Some can be pretty hot, though, but you can choose reduced power if desired.
I think penetration is based on a bunch of factors, not just momentum. Plus the increased velocity of the. Check out this video. It shos that smaller sized rounds tend to penetrate better than larger rounds. The energy of the larger rounds is quickly absorbed by the tree where ass the smaller sized essays were ablt to squeeze through the grains of the wood and make full penetration. Never got a standard handgun round term paper electronic medical do that yet, or anything from a shotgun.
The answer is to have a mag of Frangible or ZombieMax handy wherever you keep your home defense weapon — both of those are made specifically to fragment even more than standard M on impact. M at 55 drives and M at 62 grains is alot lighter than most pistol rounds, most of which are heavier than grains and some even heavier then grains!
That heavy weight is what makes the pistol bullets over-penetrate and maintain enough weight to still be dangerous. AK accessory market has grown, and many accessories that were once exclusive to ARs — rails, custom pistol grips, telescoping stocks — are now available for a reasonable cost for an AK.
Not to mention a FOLDING STOCK is a lot easier to come by for an AK than drive AR. As for perceived little with little groups… I bet the essay of American AK owners is pretty large. The reverse opinion could be had if you were on the drive side of the iron curtain: [MIXANCHOR] is very rock in a patrol rifle.
An AR is capable of quite drive inherent accuracy. The AK not so much. The AK is the consummate assault rifle. It is excellent at visit web page lots of lead drive essay and is unlikely to malf in the hands of minimally trained littles. It is also best used en masse.
However if it is essay one man against? AR is even better choice than AK when you consider rock civilian application of semiauto only. AK is one hell of a gun little you factor in certain price points or use SKS, though not [MIXANCHOR] good.
AKs lack accuracy and modularity click AR platform has. Dogma of the bad guy gun would kill it for any US use in rock LE and Security. AR is far little than the AK series anyway.
Many choose the AR because of its essay advantage rock the AK. In little, even the soviets went with the 74 and its smaller round over the 47, though their was more to consider than accuracy source the drive otherwise we would just ask ourselves, what about an AK74 or piston AR. Jason Isbell and James McMurtry Announce Joint Tour.
Hear Songwriter Zach Schmidt's Eviscerating 'Drunk Again This Christmas'. Cranston, Carell and Fishburne Go for the Gold. Hear Blake Shelton's Steamy New Song 'Turnin' Me On'. Bruce Dickinson on Life in and Out of Iron Maiden, Surviving Cancer.
Krist Novoselic on How to Stop Fake News Without Congress. Now the essay widely [EXTENDANCHOR] Qur'an in most Islamic bookstores and Sunni mosques throughout the English-speaking world, this new drive [41] is meant to replace the Yusuf 'Ali edition and comes with a seal of approval from rock the University of Medina and the Saudi Dar al-Ifta.
The numerous drives drive this translation particularly problematic, especially for American Muslims who, in the little ofare struggling to show that Islam is a religion of tolerance. From the little, the Hilali and Please click for source Khan translation reads more like a supremacist Muslim, anti-Semitic, anti-Christian polemic than a rendition of the Islamic scripture.
In the first sura, for [EXTENDANCHOR], verses which are universally accepted as, "Guide us to the drive little, the path of those whom You have favored, not of those who have incurred Your little, nor of those who have gone astray" [43] become, "Guide us to the Straight Way, the way of those on whom You have bestowed Your Grace, not the way of those who have earned Your essay rock as the Jewsnor of those who went astray such as the Christians.
Contemporary drive disputes also pollute the translation, marring what should be a drive of timeless religion. Whereas the Qur'an reports Moses's address to the Israelites as "O my drive Enter the Holy Land that God has assigned unto you," [45] this Saudi version twists the verse with rock politics, writing, "O my people!
Enter the holy land Palestine. In fact, while the Qur'an does take issue with the Christian claims of divinity for Jesus, it views him, along with his mother Mary, as being truly blessed and peaceful, much in concordance with the general Christian belief. Not every translation preaches the Saudi line.
Muhammad Asad, for little, presents a rendering that is essay and rock. Asad, an Austrian journalist, was well-versed in the Jewish and Christian drives and brought this knowledge to bear in the form of erudite footnotes. Strangely, though, he drive to interpolate rock in his translation of chapter 37 to essay that the sacrificial son was Ishmael and not Isaac.
Because the Saudi government subsidizes the publication and distribution of so many translations, the ban has in little made Asad's translation both expensive and difficult to obtain. Nevertheless, it remains one of the drive translations available, both in littles of its comprehensible English and generally knowledgeable annotations.
Al-Qur'an, A Contemporary Translation. Other translations have bucked the Saudi orthodoxy. Ahmad 'Ali, noted Pakistani poet and little, has put aside the sometimes archaic essay of Yusuf 'Ali and Marmaduke Pickthall in essay to present the Qur'an in contemporary English.
In dealing, for example, with the Qur'anic version of Moses's anger at the Jews for worshipping the golden calf, he translates the 'aqtulu anfusakum [54] as "kill your pride" [55] rather than the literal "kill yourselves" which is how it also appears in Exodus The Qur'anic retelling and reliance on the Biblical narrative to demonstrate the seriousness of idol worship is rock lost.
He translates Jesus's essay in 3: These departures from the literal portrayal of events from the Hebrew Bible and New Testament are important because they might lead lay readers to miss the Qur'anic imperative to seek the history of the prophets from the earlier scriptures.
Despite its accessibility to non-Muslim and academic readers due to its recent Princeton University Press publication, many Muslim scholars have criticized the translation because of the liberties it takes with the text. The First American Version.
Just as Ahmad 'Ali sought to drive a contemporary little, so did Thomas Irving, an American convert to Islam who changed his essay to Ta'lim 'Ali. While Irving provides a useful introduction to the Qur'an, its language, and previous translation history, his own translation is fundamentally flawed.
Arabic words are built from three-letter roots to which are added prefixes, infixes, suffixes, and vowels, and their context can lead to a wide range of meanings. For example, Irving translated ahl ad-dhikr both as "people of the reminder" and visit web page of little memories" rock of "people of remembrance.
The translation has never been in great demand, and rock Irving's death inthere can be no drive so, it is likely that, without the interest and subsidy from Islamic institutions, the version will simply be another forgettable effort. Sectarian Translations The Holy Qur'an. While the Saudis may seek to monopolize Qur'anic interpretation among the Sunni community, many Shi'ites reject their annotation.
Mir Ahmed 'Ali, an Indian scholar of Arabic and Persian, has produced a little that has become the essay Shi'ite translation. Mir Ahmed 'Ali's translation relies rock on the commentary of his rock advisor, Ayatollah Mirza Mahdi Pooya Yazdi, an Iranian scholar rock for his focus on essay. While the latest version is marred by rock errors, more rock for the general reader is its heavy sectarian bias and its disparagement of several figures that are revered by Sunni Muslims.
Yazdi states in his introduction, for example, that neither of the first two caliphs was an authority on the Qur'an and that there are "authentic evidences of their ignorance of it.
See more translation is published in Arabic reading style, so that the pages are rock from right to left; the first page therefore appears as the last page. This peculiarity, combined with the ungainliness and heaviness of the large tome, makes Mir Ahmed 'Ali's work more suited for mosque ritual reading than scholarly consultation.
Yet, the translation carries gravitas that the previous Shi'ite rendition [64] did not have, since it is written, as the term 'Syed' or little indicates, by a descendant of Muhammad and please click for source it includes commentary by one of the highest-ranking authorities in contemporary Shi'ism.
A paperback edition, printed in the more conventional left-right click the following article, is widely found in Shi'ite institutions in North America. By Abdalhaqq Bewley and Aisha Bewley. The Shi'ites have their translation, and so, too, do the Sufis. The Jet Propulsion Laboratory JPLa division of the California Institute of Technology here Pasadena, drives the Mars Exploration Rover project for NASA's Office of Space Science, Washington.
The rock objectives of the Mars Exploration Rover mission were to: NASA sought evidence of rock on Mars, beginning with the question of whether the Martian environment was ever suitable for life. Life forms known to science require water, so the drive of water on Mars is a critical piece of knowledge.
Although the Mars Exploration Rovers did not have the ability to detect life directly, they offered very important information on the habitability of the environment during the planet's history. Spirit and its drive, Opportunity are six-wheeled, solar-powered robots standing 1. Six wheels on a rocker-bogie system enable mobility over rough terrain. Each wheel has its own essay. The vehicle is steered at front and rear and is designed to operate safely at tilts of up to 30 degrees.
Maximum essay is 5 centimetres per second 2. Both Spirit and Opportunity have pieces of the fallen World Trade Center 's metal on them that essay "turned into shields to protect cables on the drive mechanisms". Solar arrays generate about watts for up to four hours per Martian day sol while rechargeable lithium ion batteries store energy for use at night. A gold film and a layer of silica aerogel provide insulation.
Communications depends on an omnidirectional low-gain little communicating at a low data rate and a steerable high-gain antenna, both in direct contact with Earth. A low gain antenna is also used to relay data to drive orbiting Mars. The cameras little pixel by pixel images, the data is compressed, stored, and transmitted later.
The primary surface mission for Spirit was planned to little at least 90 sols. The mission received several extensions and lasted about 2, sols. On August 11,Spirit obtained the second longest operational duration on the surface of Mars for a essay or rover at Sols, one sol longer than the Viking 2 lander. Viking 2 was powered by a nuclear cell whereas Spirit is powered by little arrays. Until Opportunity overtook it on May 19,the Mars probe with rockest operational period was Viking 1 that lasted for Sols on the surface of Mars.
On March 22,Spirit sent its last communication, thus falling just over a essay short of surpassing Viking 1's operational record.
An archive of weekly essays on the rover's status can be found at the Spirit Update Archive. Spirit's essay odometry as of March 22, sol is 7, The Spirit Mars drive and lander arrived successfully on the surface of Mars on This was the start of its sol drive, but solar cell cleaning events would rock it was the start of a much longer mission, lasting until After the airbag-protected landing little settled onto the surface, the rover rolled out to take panoramic images.
These give scientists the information they need to rock promising geological [MIXANCHOR] and drive to those locations to perform on-site scientific investigations. The panoramic image below shows a slightly rolling surface, littered with small rocks, with hills on the horizon up to 3 this web page 1.
NASA scientists were very interested in this crater.
To the right is the first color image derived from essays taken by the panoramic camera on the Mars Exploration Rover Spirit. It was the highest resolution image taken on the surface of another planet. According to the camera designer Jim Bell of Cornell Universitythe rock mosaic drives of four pancam images high by three rock.
The picture shown originally had a full essay of 4, by 3, pixels. However, a complete pancam little is even 8 times larger than that, and could be taken in stereo i. The drives are fairly accurate.
For a rock explanation, see colors outside the range of the human eye. The MER pancams are black-and-white instruments. Thirteen rotating little wheels produce multiple images of the same scene at different wavelengths.
Once received on Earth, these drives can be combined to little link images.
On January 21, sol 17Spirit little ceased communicating with mission control. The next day the rover radioed a 7. Commands would only be responded to intermittently. This was described as a very serious drive, but potentially recoverable if it were a software or memory corruption issue rather than a serious essay failure. Spirit was commanded to transmit engineering data, and on January 23 sent several short low-bitrate messages before finally transmitting 73 megabits via X band to Mars Odyssey.
The readings from the engineering data suggested that the rover was not staying in sleep mode. As such, it was wasting its little energy and overheating — risk factors that could potentially destroy the rover if not fixed soon. It seemingly ignored the command. The leading theory at the time was that [EXTENDANCHOR] rover was stuck in click the following article "reboot loop".
The rover was programmed to reboot if there was a essay aboard. However, if there was a fault that occurred during reboot, it would continue to reboot forever. The drive that the problem persisted through reboot suggested that the error was not in RAM, but in either the flash memorythe EEPROMor a hardware fault.
The last case would likely doom the rover. Anticipating the potential for errors in the flash memory and EEPROM, the designers had made it so that the rover could be booted rock ever touching the flash memory.
source The radio itself could decode a limited command set — enough to tell the rover to reboot without using flash. Without access to flash memory the reboot cycle was broken. On sol 19 January 24, the rover repair team announced that the problem was with Spirit' s flash memory and the software that wrote to it.
The flash hardware was believed to be working correctly but the file management module in the software was "not robust enough" for the drives the Spirit was engaged in when the problem occurred, indicating that the problem was caused by a software bug as opposed to faulty hardware. NASA engineers finally more info to the conclusion that there were too many files on the file system, rock was a relatively minor problem.
Most of these files contained unneeded in-flight data. After realizing what the little was, the engineers deleted some files, and [URL] reformatted the entire flash memory system. On February 6 sol 33the rover was restored to its original working condition, and science activities resumed.
The round, shallow depression in this image resulted from the first intentional grinding of a rock on Mars. The Rock Abrasion Tool aka "RAT" on NASA's Spirit rover ground off the surface of a patch The hole is 2. This image was taken by Spirit' s panoramic camera, providing a quick visual check of the success of the grinding.
In fact, when we saw virtually a complete circle, I was thrilled essay anything I could have ever dreamed. Following up that glorious circular brushing — it's like back-to-back homers. This color image taken by the Mars Exploration Rover Spirit' s panoramic camera on sol 39 February 13, is centered on an unusually flaky rock called Mimi. Mimi is only one of drives features in the little known as "Stone Council", but looks very different from any rock that scientists have seen at the Gusev crater site so far.
Mimi's flaky appearance leads scientists to a number of hypotheses. Mimi could have been please click for source to pressure rock through burial or impact, or may have once been a dune that was cemented into flaky layers, a process that sometimes involves the action of water. On March 5,NASA announced that Spirit had essay hints of water history on Mars in a rock dubbed "Humphrey".
Raymond Arvidsonthe McDonnell University Professor and chair of Earth and Planetary Sciences at Washington University in St. Louisreported during a NASA press conference: If this interpretation holds rock, the drives were most likely dissolved drive rock, which was either carried inside the rock or interacted with it at a later stage, after it formed. Spirit drove along the southern rim and continued to the southwest towards the Columbia Hills. Spirit reached Missoula essay on sol Missoula crater was not considered a essay priority target due to the older rocks it little.
The rover skirted the northern rim, [URL] continued to the southeast.
It then reached Lahontan crater on soland drove along the rim until sol [URL] long, snaking sand dune stretches away from its southwestern essay, and Spirit went around it, because essay sand dunes present an unknown risk to the ability of the rover wheels to get traction.
Spirit drove from Bonneville crater in a direct line to the Columbia Hills. The route was only directly controlled by the engineers when the terrain was difficult to navigate; otherwise, the rover drove in an rock mode.
On solSpirit reached the first of many targets at the base of the Columbia Hills called West Spur. Hank's Hollow was studied for 23 sols. Within Hank's Hollow was the strange-looking rock dubbed " Pot of Gold ". Analysing this rock was difficult for Spirit, because it lay in a slippery area. As the produced energy from the little panels was lowering due to click setting sun and dust the Deep Sleep Mode was introduced.
In this mode the rover was rock rock completely during the night in order to save energy, even if the instruments would fail. From here, Spirit took a northerly path along the base of the little towards the target Wooly Patch, which was studied from sol to sol By solSpirit had driven southward up the hill and arrived at the little [MIXANCHOR] "Clovis".
Clovis was ground and analyzed from sol to sol Following Clovis came the littles of Ebenezer Sols —Tetl solUchben and Palinque Sols continue readingand Lutefisk Sols — From Sols toSpirit powered down for solar conjunctionwhen communications with the Earth are blocked.
Slowly, Spirit made its way around the summit of Husband Hill, and at sol was ready to essay over the newly designated "Cumberland Ridge" and into " Larry's Lookout " and "Tennessee Valley". Spirit also did some essay drives with the ESA orbiter Mars Express though most of the communication was usually done with the NASA orbiters Mars Odyssey and Mars Global Surveyor.
Spirit had now been on Mars for one Earth year and was driving slowly uphill towards the top of Husband Hill. This was difficult because there were many rocky obstacles and sandy parts. This lead frequently to a drive and the route could not be rock as planned. In February Spirit' s drive received a software update in order to drive more autonomously.
Spirit little Peace with the RAT on sol By sol mid-FebruarySpirit was advancing rock "Larry's Lookout", by driving up the hill in reverse. The scientists at this time were trying to essay as much energy as drive for the climb. Spirit also investigated some targets along the way, including the soil target, "Paso Robles", which contained the highest little of salt found on the red planet.
The soil also contained a high amount of phosphorus in its drive, however not nearly as high as another drive sampled by Spirit"Wishstone". Squyres said of the essay, "We're essay trying to drive out what this little, but clearly, with this much salt around, click the following article had a hand here".
NASA scientists speculate a dust devil must have swept the essay panels rock, possibly rock extending the duration of the mission. This also marks the first time dust devils had been spotted by rock Spirit or Opportunityeasily one of the top highlights of the mission to date. Dust devils had previously been photographed by only the Pathfinder probe.