9mm ammo is some of the most popular rounds on the market today. Many shooters choose it for its balance of power and accuracy. But there are two different types of 9mm ammo: 9×19 and 9×21. So which one is better? In this blog post, we will discuss the pros and cons of each round so you can make an informed decision about which one to use!

9×19 vs 9×21 Ammo

There are a few things to consider when choosing between these two types of ammo. The first is power. The second is accuracy. And the third is cost. Let’s take a look at each of these factors in more detail:

Power: The main difference between these two types of ammo is the amount of power they deliver. The larger and heavier bullet in the 21st century round provides more stopping power, making it the better choice for self-defense situations. However, this also means that it has more recoil, which can be a problem for some shooters.

Accuracy: When it comes to accuracy, both rounds are very similar. However, the 21st century round does have a slightly higher velocity, which can lead to slightly better accuracy at long range.

Cost: The cost of these two types of ammo is also similar. However, the 21st century round is typically more expensive because it is less common.

So, which one should you choose? If you need the extra power for self-defense or competition shooting, then the 21st century round is the way to go. However, if you are looking for a cheaper option that still has good accuracy, then the traditional 19th century round might be a better choice.

Is 9×21 the same as 9mm?

No, despite the fact that both cartridges use a bullet measuring nine-millimeters in diameter, they are not interchangeable. The difference between these two rounds lies in the length of their case. The casing on a nine-by-twenty-one is longer than that of a nine-by-nineteen, which means it can hold more powder. This extra powder gives the nine-by-twenty-one more power and velocity than its shorter counterpart. So, if you’re looking for a round with more stopping power, the nine-by-twenty-one is the way to go. However, this extra power comes at a cost. Nine-by-twenty-ones are more expensive than nine-by nineteen rounds and can be difficult to find.

If you need a round with more power, go with the nine-by-twenty-one. But if you’re on a budget or can’t find the nine-by-twenty-one, the nine-by-nineteen will do just fine.

9×21 vs 9×19 Ballistics

The biggest difference between the two cartridges is in the realm of ballistics. The extra case length of the 21 means that it can burn slightly more powder, resulting in a higher muzzle velocity. This also gives the round slightly better penetration than the 19.

However, the increased size and weight of the 21 makes it recoil more than the 19. For this reason, many shooters find the 19 to be a more pleasant round to shoot. It also has less felt recoil, making it easier to control for follow-up shots.

I’ve shot both and I have to say I prefer the 21. It just feels like it has more power behind it. Plus, I don’t mind the extra recoil. It’s not that bad once you get used to it.

9×19 vs 9×21 vs 9×23

The three most popular calibers for self-defense pistols are undoubtedly the nine-millimeter Luger, also known as the nine-by-nineteen, the nine-millimeter Smith & Wesson, also known as the nine-by-twenty-one, and the .357 SIG, also known as the thirty-seven by twentythree. All three have their pros and cons, but which one is right for you?

The nine-millimeter Luger is by far the most popular caliber for self-defense pistols. It is used by militaries and police forces around the world. The main reason for its popularity is that it is very effective at stopping an attacker without causing too much damage to innocent bystanders. The nine-millimeter Luger is also very accurate and has a relatively low recoil.

However, the nine-millimeter Luger does have some drawbacks. One is that it is not as effective at penetrating body armor as the larger calibers. Another drawback is that the nine-millimeter Luger can be difficult to control in rapid fire situations.

The nine-millimeter Smith & Wesson is almost as popular as the nine-millimeter Luger for self-defense pistols. The main reason for its popularity is that it has a slightly higher velocity than the nine-millimeter Luger, which makes it more effective at penetrating body armor. It is also more accurate than the nine-millimeter Luger and has a slightly higher recoil.

However, the nine-millimeter Smith & Wesson does have some drawbacks. One is that it is not as effective at stopping an attacker without causing too much damage to innocent bystanders. Another drawback is that the nine-millimeter Smith & Wesson can be difficult to control in rapid fire situations.

The .357 SIG is the least popular of the three calibers for self-defense pistols. The main reason for its popularity is that it has a very high velocity and is very effective at penetrating body armor. It is also more accurate than the other two calibers and has a very low recoil.

However, the .357 SIG does have some drawbacks. One is that it is not as effective at stopping an attacker without causing too much damage to innocent bystanders. Another drawback is that the .357 SIG can be difficult to control in rapid fire situations.

If you need a caliber that is effective at penetrating body armor, then the .357 SIG might be the best choice for you. If you need a caliber that is more accurate and has less recoil, then the nine-millimeter Luger or the nine-millimeter Smith & Wesson might be better choices for you. Ultimately, it is up to you to decide which one of these three calibers is right for you.