Posted on 03/24/2015 6:35:31 PM PDT by Redcitizen
A machine gun belt often has AP, Tracer, and other? mixed together.
Please learn the facts before spouting mis-information. The Geneva Convention addresses treatment of POW's among other issues. It is The Hague Conventions that address rules for civilized warfare among other issues.
In addition, the Hague Conventions only apply to uniformed soldiers from one of the belligerent parties involved in a particular war. They do not apply to guerrilla warfare or terrorists.
Furthermore, the U.S. has never ratified or signed The Hague Conventions, although we have generally complied by not using expanding bullets. However, one of the several weapons I was issued in Vietnam was a 12 gauge riot gun and OO buckshot, the soft lead pellets of which did not comply.
The .303 MK7 round went sideways for a good reason.The Brits put an aluminum plug in the front of the bullet that made nose light and the base heavy.Bullet keyholed when it hit flesh.
Well, if ever there was a braying jackass she would be the picture
Agreed. Just because a bullet has a hollow point doesn't mean it has to expand. However, the hollow point does cause the bullet to tumble more reliably than just the hinky geometry of the standard 5.56 round.
That's why the 28 grain 5.7x28 round incorporates the feature. The hollow point will collapse somewhere along the perimeter of the cavity and initiate the tumble in as little as two inches of penetration. Furthermore, because the tumble starts somewhat quickly after the initial penetration, it tends to dump ALL the energy Very quickly, but at a greater depth than the standard round.
"The M16 and M4 have different barrel lengths." Yes
"If the powder gets a bullet up to speed in the M4 short barrel it will cause overpressure in the longer M16 barrel." Not true.
The chamber pressure is measured in a test barrel. By the time the bullets traverse the length of the shorter M4 barrels, they are already on the down slope side of the pressure curve and the pressure will continue to decrease no matter how much longer the barrel may be. Velocity may increase, even though pressure is decreasing.
"If it gets the round up to speed in the longer barrel it will be under speed in the shorter M4 barrel." (WTF?) Bullet motion is measured by rotation and velocity, not speed. 5.56mm ammunition average velocity and maximum chamber pressure is specified and determined in a 20 inch length test barrel, not the barrel length of individual weapons.
"Speed - spin - accuracy. Can’t get the same performance from both rifles with the same round." Please repeat the obvious over and over until you have it memorized.
No, he does not. U.S. military 5.56mm ammunition is pressure and velocity tested in 20 inch barrels. Commercial .223 Rem ammunition is tested in 24 inch SAAMI test barrels. You are comparing apples to oranges.
In addition, the .223 Rem and 5.56mm cartridges are not identical. They have different chamber configurations, different rifling twists, different velocity specifications and different pressure specifications. The pressure is tested using entirely different equipment and procedures. The numbers are not interchangeable.
It can put food on the table.
That is the best answer I’ve seen yet.
Active Duty ping.
Different rifling twists? On a round?
Never seen a rifled round. Have seen many rifled bullets after they had been fired and picked up their twists from going through the barrel.
I’m talking same round, same powder and two different barrel lengths.
Once smokeless powders and spitzer bullets allowed velocities above 2400 fps, it was discovered that bullets would tumble on inpact, and designing to maximize that effect began.
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