His claim is that the higher pressures in the 5.56 NATO Cartridge will cause the primers to back out due to the increased pressure and loctite will prevent this.
Is this accurate at all?
Anyone loading to military pressures in the 223 or 5.56 is nuts. The original case pressures, back in the late 50's and early 60's, were 50,000 psia. However, all this cartridge has was velocity and the velocity was insufficient. The military began bumping the pressures up early, I think 52,000 psia, and they keep on bumping the pressures up.
Testing The Army’s M855A1 Standard Ball Cartridge
http://www.americanrifleman.org/art...ng-the-army-s-m855a1-standard-ball-cartridge/
In 1984, the USMC conducted a test comparing the Vietnam-era, 55-grain, M193 round to the then-new 62-grain, green-tipped M855, which had boosted chamber pressure from 50,000 p.s.i. to 53,000 p.s.i. Side-by-side, 6,000 rounds each were fired through M16A1s and M16A2s with the green-tip’s hotter load. While the M16A1s saw virtually no accuracy decline, the M16A2s saw their groups more than double in size-the sole variable was chamber pressure. And the new cartridge generates even greater pressure, perhaps 3,000 to 5,000 p.s.i.
For gas port pressure, the M855A1 generates 50 percent higher pressure (23,767 p.s.i.) Dept. of Defense photo by U.S. Army S/Sgt. Jason Epperson on the Special Ops 11.5-inch M4 barrel, compared to the 16,067 p.s.i. with the M16A2’s 20-inch barrel. That has been shown to cause port erosion, which boosts the automatic-fire rate, increasing the likelihood of jams. In the 2011 tests of new Army carbine prototypes, the barrels experienced “accelerated bolt wear” from firing the M855A1, because of higher chamber pressure and increased bore temperatures. A Special Operations Command test saw cracks appear on locking lugs and bolts at the cam pin holes on average at 6,000 rounds, but with as few as 3,000 rounds of “intense” full-automatic firing. The solution may be to find a means to count the number of rounds a rifle has fired.
These American Rifleman testers don't know the current pressure of M855A1 because the Army has decided to classify this information, but I believe the average pressure is over 60,000 psia with a max probably around 65,000 psia. The original proof pressure cartridge was 70,000 psia, so this load is insanely hot. The rifles were not designed for this sort of pressure and bolt lugs are going crack around the 5000 round mark, instead of the typical 10,000-15,000 with commercial 223.
No one should assume that the Army Ordnance Department actually knows what they are doing. The more Army decisions I see the more incompetence I see. Heck, they were going to burn all the Camp Minden artillery powder in the open air. When asked if they had tested the fumes for toxic chemicals, they told the questioner they had not because the temperatures around the burn pile were too hot!
Camp Minden: From blast to possible burn
http://www.ktbs.com/story/28065933/camp-minden-from-blast-to-possible-burn
These Army idiots could not conceive of a sensor on a stick, or a sensor at the end of a crane boom, or building scaffolding and sticking sensors above the fire. What these Army fools were going to do was burn millions of pounds of old propellant in the air and let the toxic fumes blow where the winds would lead them. Which would be over populated areas.
So, when it comes to mindlessly upping the pressures on their ammunition, the Civilians in the Army Ordnance Department will do it. I am confident these Army fools don't know the structural limits of their weapons and don't care if the things wear out quickly, because someone else is paying the bill. These are the same people who over loaded their HMMWV's about 17,000 pounds over gross, with armor. I listened to a Car Talk episode, Army Maintainers had called in and wanted to know if there was a way to increase the lifetime of their ball joints. Their ball joints were lasting for three weeks, when asked, they said the HMMWV was 17,000 pounds over its weight limits!. When something is that overloaded, there is nothing you can do, the parts are going to fail in three weeks, instead of a 20 year design limit.
So, if you are going to load 5.56 ammunition to 65,000 psia, you might as well glue the primer in, crimp it in, staple or duct tape it in, because the darn thing is going to blow.
The best solution is not to load ammunition to Army Stupid levels.
