THIS IS IN TWO PARTS – ONE IS AN ANALYSIS OF 223 AMMO THAT JAMMED MIKE’S RIFLE WHEN WE WENT SHOOTING IN EAST CHINO VALLEY ON 12-16-23 AND TWO IS INFO ON THE RELOADER THAT DAVID HAS ACROSS THE STREET

On another note – https://secure1.ghostgundvd.com/offers/Select?c1=112823LEADdedAM is a page on how to make a semi auto into a full auto.

FIRST THE 223 AMMO

Mike, this is for you – I investigated the 223 REM AND THE L2A2, not the others but I find nothing to tell why these would jam your rifle. I recommend you get these back from me and go to a gunsmith.

Below are the bullets Mike gave me to analyze because they did not work in his rifle. I sorted them by the nomenclature stamped into the shell end. Most of them are Remington 223s, some are L2A2. One is most interesting – it is the only one with a black tipped bullet. It is marked

DIFFERENCE BETWEEN 223 AND L2A2

Here is a terrific web site showing the “nuances” that differentiate the 223 from the L2A2.

https://ammo.com/comparison/223-vs-556

One of the key differences between .223 Remington and 5.56 NATO ammunition is the case length. The .223 Remington case is slightly shorter than the 5.56 NATO case, which means it holds less powder. This results in lower chamber pressure and different ballistic performance.

Specifically, the .223 Remington case is 1.750 inches long, while the 5.56 NATO case is 1.760 inches long. This seemingly small difference of 0.01 inches can actually lead to a roughly 10% difference in chamber pressure.

Shooting 5.56 NATO ammo in a .223 Remington rifle is generally safe, but you need to be aware of the pressure limitations. Firing ammo designed for higher pressure in a gun built for lower pressure can potentially damage the firearm.

However, using .223 Remington ammo in a 5.56 NATO rifle might affect performance. Due to the lower pressure, .223 Remington bullets will have lower muzzle velocity and shorter effective range.

Below is the special tipped one enlarged.

And here is the shell end . This headstamp is an interesting mystery. It might be from Polytech Ammunition Company. Below is what Bard says about it.

People also ask

Are 22 and 223 the same diameter?

223 and . 22LR are the same, the rounds have the same bullet diameter. While the casing for the rounds are not the same and the bullets may look wildly different, they measure the same diameter of . 223″.