1. What is the difference between .223 ammo and 5.56 ammo?

There isn’t much of a difference between the two, yet there are still significant differences. The main difference is pressure. .223 is loaded with less powder than 5.56, which is why you are able to shoot .223 ammo from a 5.56 barrel. However, 5.56 cannot be fired from a .223 Remington barrel. A .223 Wylde barrel allows you to shoot both and slightly increases accuracy. Another difference is 5.56 has a slightly thicker wall inside the casing, which makes it a little heavier and stronger for the reloading folks. Last but not least, price! .223 tends to be somewhat cheaper than 5.56.

2. What is the difference between .223/5.56 ammo and 300 blackout ammo?
Let’s start with how 300 blackout came about. It was created with the intent of being 7.62 x 39 for the AR-15 with a simple upper or barrel change. 300 blackout is heavier and penetrates better.It uses a cut down 5.56 casing with a 30 caliber bullet.. Because 300 blackout is heavier it’s prone to be slower, yet packs more of a punch than .223/5.56. The cost of 300 blackout is higher than .223/5.56. The battle of David vs. Goliath.
3. What is the difference between 7.62 x 39 and 300 blackout?
Ballistics wise these two are very similar. Probably because the 300 blackout was made in the image of 7.62 x 39 for the AR-15. When most people think of 300 blackout they think AR-15, when they think of 7.62 x 39 they think AK. Although this isn’t always the case, it’s pretty generalized. The biggest difference between the two is price. 7.62 x 39 is cheaper and more readily available, although 300 blackout is progressively becoming more available. Blackout is built from a 5.56 casing so no feeding issues with magazines, but the main complaint with 7.62×39 is the mags dont cycle as smoothly as they should. Most people dial in their rifles but that is something to expect.
5. What is the difference between twist rates of 1:9, 1:8, and 1:7?
Let’s start with what a twist rate is. In layman’s terms it is the speed at which it takes a bullet to rotate. The first number refers to one full rotation of the bullet. The second number is the amount of inches it takes to make that one rotation. The reason twist rate is important is because it stabilizes your bullet. This is necessary because we all want our bullets to shoot straight, right? Well, the bullet gets stabilized during this twist process and allows us to shoot accurately. The weight of your ammo also plays a part because if a certain bullet doesn’t spin enough it’s not stabilized and will wobble. If it’s over stabilized it will fly out of control and begin to fall apart, therefore, it won’t cause much damage to your target because it’s become too fragile. So to tie it all together, make sure you are using the right ammo with the right twist rate to optimize accuracy and performance.  Higher twist rate heavier bullets, lower twist rate lighter bullets.
6. What are the differences in barrel lengths on the AR-15? 
With shorter barrels you are losing velocity, pressure, and powder burn so essentially your bullet is leaving the barrel with less speed. You’ll also have more recoil. The longer the barrel the longer the range/accuracy rate. Meaning your bullet will go a farther distance with a longer barrel than a shorter one. When considering barrel length you’ll also want to consider the caliber of ammo you are using. A .223 round was meant to shoot out of a longer barrel, whereas a 9 mm and 300 blackout would be ideal for a shorter barrel because of the shorter burn rate.
7. Nitride coated barrel vs. Non-coated barrel.
Before we get into all the intricate details let’s begin with the basic stuff. Nitride will harden your barrel. There will be less wear on your barrel and you don’t lose accuracy. Now on to the deeper stuff. Nitride isn’t actually a coating which is why you won’t lose accuracy. It changes the surface properties by diffusing nitrogen and carbon into the metal surface to create a smooth, uniform, and wear-resistant barrel. Nitride doesn’t add “thickness” to the barrel like other coatings so nitride is great for finished barrels. A non-coated barrel will be more susceptible to wear and tear and corrosion, which decreases your barrel life.


By REE 0 8.