manaman said:
A semi-automatic weapon automatically loads the next round after firing, but will not fire again until you release and then pull the trigger again. For all intents and purposes a revolver does the same thing with the cylinder rotating, it puts the next round into the firing position, but will not fire that round until you release then pull the trigger again.
A civilian model AK-47 is just a gun with a low power cartridge (in the 7.62x39 varient, the .223 Remmington can be used for target shooting if you want, but the AR-15 in .223 Remington will outperform it any day). It's not automatic in any way, burst fire is a form of automatic as well.
Besides rapid fire would be horrible for hunting. You would do nothing but destroy meat. You should take down the animal with one shot through the heart because it kills quickly.
Again there is no such thing as an Assault Rifle, Assault Rifle is just a term for a military looking rifle, they are no different the any other rifle.
You are indeed (very generally at least) correct. The last point, however, is not entirely correct. An Assault Weapon (per the ban) had less to do with the performance and function of a particular weapon than it did with how said weapon looked. An Assault Rifle, from the historical standpoint, is quite different from it's contemporaries. They tend to have the capacity for automatic fire (volume of fire does wonders to cover an advance, especially when said advance is rapid enough that it cannot be covered effectively with crew served weapons) and they also have large magazine capacity (to reduce the time a soldier might spend reloading, which translates directly into a higher sustained volume of fire). Round per round, an assault rifle is just a rifle. Hell, most of the time, an assault rifle is fired in a semi-automatic fashion as automatic fire is generally used specifically for the purpose of maintaining volume of fire. If you take the US Army weaponry, you'll find that automatic rifle fire is used during times when the automatic riflemen are busy doing other things (reloading, swapping barrels, etc).
manaman said:
It would also have to be grandfathered in after the Brady bill took effect. They have been outlawed since 1968, so the weapon would have had to have been manufactured and in the US prior to the bills passing to be legal. Good luck getting one even if you can pay for the permits as they are all in the hands of private collectors.
The law that prohibited new automatic rifles from being sold (The Assault Weapons ban) expired in 2004.
manaman said:
When you look at the power behind a round you can measure it several ways, usually either foot lbs or Joules, typical information you look for with a round is the energy of the bullet when it leaves the barrel and right around the distance you intend to use it (you are also looking for bullet drop). You pick the load best suited for your applications, say the best load to maximize ballistic coefficient to deliver high energy over a long distance, or a lower ballistic coefficient for higher accuracy over shorter distance. Even then depending on what you are going to use the weapon against (hunting large game, using the weapon to defend yourself at home, or using it in a war situation) looking at how the bullet behaves in flight, and how much energy it delivers on impact are not the best meters of actual damage to the target, fragmentation and yawing also matter greatly. Smaller rounds (smaller in size) tend to fragment and yaw more, and like the 5.56mm NATO round you can design the bullet to increase the chances of the bullet yawing when it encounters a density change (like going form air into a persons body). It's why 5.56mm rounds have been known to enter a person leg and exit a person chest. The 5.56mm NATO round is actually an amazing round. It is extraordinarily stable in flight and a perfect balance of a short to medium range. The bullet has a high energy and a low profile which has a high penetration and decent, while at the same time tends to either fragment or, yaw (basically start rotating along another axis) when it encounters a less resistive density change. In other words it could go straight through a wall and then split into pieces or yaw when it hits a person on the other side of the wall.
This is, very generally, true. With respect to the 5.56mm NATO round, the problem is, the current round in use tends to neither yaw nor fragment but rather simply penetrates straight through a target, resulting in a significant loss of energy. Additionally, those features that make the round stable in flight also lend said round a (generally) narrow wound channel. Thus why there have often been attempts to come up with a round that maintains all those positive aspects of the 5.56mm while compensating for the flaws present in many of said rounds.
manaman said:
Still none of that means a damn in the scenario you presented. You simply said a 9mm wouldn't be as effective for killing yourself and implied that that a 9mm round was a tiny bullet. I corrected you by saying a 9mm round is of course larger in diameter then a 7.62mm bullet, and that it's not going to matter one shiny bit of difference which round you use when you hold the gun to your head too off yourself. By that I took to mean the very common 9x19mm Parabellum handgun round you where talking about.
The 9mm round you mention is, without reservation or caveat, less energetic than a 7.62x39. It has more mass (most of the time, I'm quite sure I could find some extraordinarily light 9mm round and some unusually heavy 7.62x39 round), certainly, but the dramatically lower muzzle velocity is the telling difference. What's more, the particular design of the 7.62x39, while not terribly well suited to penetrating armor, tends to deliver a significant portion of it's energy to the target before exiting. In most any case you care to mention, the energy delivered to a fleshy target will be greater with a 7.62x39 than that 9mm parabellum.
Even compared to other pistol cartridges, the 9mm parabellum round is inferior in most respects to many other common rounds. It carries significantly less energy than .40 S&W or .45 ACP (which are 1 mm and ~ 2mm larger respectively), and even less than the significantly smaller .357 Magnum. In exchange, you have a weapon that is easier to fire quickly (less recoil) with a larger ammunition count fitting into an equivalent space (12 rounds for a .40 S&W to a similarly sized 15 9mm magazine). In the case of the US, the transition was made not because the 9mm round is good, but rather because we were the only NATO nation still using a .45 ACP. Combine that with the fact that the m9 is, all things considered, actually an excellent weapon in spite of it's caliber and can be acquired for a fraction of the cost of the m1911a1 and it was a shoe in. To this day however, special operations units continue to use handguns in other calibers, as do police departments across the nation. When given a choice in the matter, few officers would actually choose to carry a 9mm when there are plenty of other, better, options available.
manaman said:
Or you know you could be right and even holding the gun to your head you only have a 50-50 chance of killing yourself and 9mm just happens to be one of the most common handgun rounds in the world because people don't want reliability out of their handguns.
The .22 LR isn't a particularly useful round for killing people and, yet, it is the round of choice for especially small weapons. The 38 special is inferior even to other roughly equivalent rounds and yet it is still used thanks to it's amazingly low cost and low recoil. Unsurprisingly, in the realm of weapons designed for personal defense, lethality is not, nor has it ever been, the chief concern. I can certainly better defend myself with a full sized handgun that fires a .45 ACP round but such a weapon is large and difficult to conceal, has an uncomfortably large grip with the magazine is double stacked and is more expensive to maintain my proficiency in (in terms of ammunition cost). Thus why I opted for a short barreled, smaller caliber round. I maintain a reasonable ammunition count (10 rounds), and high probability of lethality (.40 has ~ 50% more energy at the muzzle than a 9mm round from the same handgun yet ~ 30% less than a .45 ACP), compact design (makes it easier to conceal and carry without discomfort) thanks to such a decision.
manaman said:
I'm not quite getting what you mean about bullet drop with a .50BMG cutting people in half, are you trying to tell me the bullet is fired from so far away it comes down square on top of a person and splits them down the middle (which is laughably ridiculous), or are you trying to tell me that somehow the bullet flies straight at them and then drops suddenly as it passes through them (again good for a nice laugh). The likely case here is that the guys telling the stories are doing what most guys telling stories do, and are embellishing them.
I'm quite sure the post you are responding to is rubbish. Yes, a .50 BMG has a habit of removing limbs and turning people into hamburger but this has absolutely nothing to do with bullet drop. Instead, you find that, when you move an object rapidly through a fluid (the body works just fine) it creates a disturbance, that radiates outward. The more energetic the object, the more energetic the disturbance. The .50 BMG, simply put, has so much energy that, when introduced to the body, produces a wound channel that is frighteningly large (many inches on a side). Tissue has only so much capacity to stretch and shift before it gives leading to amputation and sudden torso cavity evacuation among other things. The reality of the matter is that the .50 BMG was never intended for use against people but was instead developed as an early anti-tank round. While it is certainly terrifyingly effective against people, other, smaller rounds work just as well for the purposes. To this day, the weapons in the US arsenal that use the .50 BMG are the M2HB, a machine gun that provides light anti-vehicle firepower in a (reasonably) mobile package, and one of several anti-material rifles (weapons that can deliver the hugely energetic .50 BMG round very precisely, commonly used to destroy or disable important things or as a counter-sniper weapon). The heft of the weapon (~120 lbs for the former and ~30 lbs for the latter) and the brutal recoil of the latter (not to mention blowback) mean that other weapons are still used in spite of the fact other options are inherently less lethal on a round per round basis.