Before you buy a new gun for yourself, or purchase one as a gift for someone else, it’s important to know what type of firearm is best suited to your needs. The 9mm vs .45 ACP debate has been going on for years and will never be resolved. However, there are some things you can learn about these two calibers that might help you make an informed decision when making your choice between them (or maybe even change your mind). In this article we’ll cover everything from their history and construction, to the benefits each has over the other – so read on!

The 9mm cartridge was introduced in 1902 by Georg Luger and Ludwig Weimer, who worked for the German company DWM.

The 9mm cartridge was first developed in 1902 by Georg Luger and Ludwig Weimer, who worked for the German company DWM. The 9mm has since become a popular round used by law enforcement agencies around the world. It’s one of the most common pistol rounds available today, second only to .40 S&W (which is also known as 10mm Auto).

The .45 ACP is a larger but less powerful round than the 9mm.

The .45 ACP is a larger but less powerful round than the 9mm. The bullet size in the .45 ACP is 0.451 inches, whereas the 9mm’s bullet size is 0.355 inches, which means that it will penetrate deeper and cause more damage to whatever it hits. However, this doesn’t mean that you should choose this option if you want a gun to defend yourself with because while its penetration power is stronger than other rounds like .380 ACP or .38 Special; it has less velocity than either of those two bullets (224 m/s).

As for energy transfer: A person holding onto their own arm after being shot at close range by an average 9mm handgun would feel about as much pain as getting punched by someone with average strength (if not less). This means that even though both guns have similar penetration power; there are other factors such as velocity and mass distribution affecting how effective each gun could be on an attacker’s body when fired at close range.”

The .40 S&W is larger still than the .45 ACP, but smaller than the 9mm.

The .40 S&W is a popular cartridge, and it’s easy to see why. The .40 S&W is a good compromise between the 9mm and .45 ACP. It’s more powerful than the 9mm, but not as powerful as the .45 ACP–and it can use smaller magazines than either round would allow. In fact, many people prefer this caliber because they don’t want to carry around large and heavy guns (which are necessary for shooting .45 ACP). For example: if you want something lighter than an M1911A1 but still want extra stopping power over your typical Glock 19 or Sig P226 pistol, then choosing a compact pistol chambered in .40 S&W makes perfect sense!

The .45 ACP has been around for almost 100 years, making it one of the oldest rounds still in use today.

The .45 ACP has been around for almost 100 years, making it one of the oldest rounds still in use today. It was developed by John Browning in 1904 and adopted by both the United States Army and Navy as a standard pistol cartridge in 1911. The round is popular among law enforcement agencies due to its power and accuracy at longer distances, though some feel that there are better options out there for self defense purposes.

The .45 ACP does have some downsides: it’s expensive to shoot (.45 ACP ammo tends to cost more than 9mm), it has lower muzzle velocity than most other handgun cartridges (which means less recoil), and its recoil can be difficult for new shooters to manage until they get used to firing handguns regularly (however this depends on the individual). However these issues may not matter if you’re planning on using your gun primarily for competition shooting or hunting/target practice because then all you care about is how well your gun performs without having any concerns about costliness or recoil management!

The 9mm is a very popular round, with over 60 percent of law enforcement agencies using it for their service weapons.

The 9mm is a very popular round, with over 60 percent of law enforcement agencies using it for their service weapons. The 9mm is also the most popular civilian handgun cartridge in the world today.

The 9mm is not just used by civilians and police officers; it’s also commonly used by military forces as well. For example, many countries use this caliber in their sidearms such as Austria (Steyr GB), Belgium (FNH Five-seveN) and Germany (Walther P99).

The reason why so many people like this caliber is because it has good performance at close range while still being able to penetrate barriers such as car doors or walls without losing its power or velocity due to recoil loss from these obstacles when fired from longer distances away from them–which means that you won’t have any issues hitting your target even if they’re hiding behind something solid like an armored vehicle!

There are many benefits to using a 9mm handgun over other calibers of pistol or revolver; price being one of those benefits.

There are many benefits to using a 9mm handgun over other calibers of pistol or revolver; price being one of those benefits. The popularity and availability of this caliber make it an excellent choice for self-defense.

The 9mm has been around since 1905, when it was first used by the German military in their Luger P08 pistol. Since then, it has become one of the most popular cartridges in use today with over 100 million rounds produced each year worldwide! This cartridge was designed to fire at low pressure levels so that smaller guns like pistols could handle its power without any issues (most modern handguns today can handle +P ammo).

As far as price goes: buying ammo for your new gun can cost anywhere from $10-$20 per box depending on what type you purchase (FMJ or Hollow Point). If we compare this cost against other calibers such as .45 ACP ($25+) and 10mm Auto ($45+), then we see just how affordable shooting a 9mm really is!

One major advantage of carrying a 9mm pistol as opposed to some other guns is that they hold more rounds in their magazine compared to others of similar size.

The 9mm handgun is a popular choice for many law enforcement agencies. The reason behind this is that it is cheaper than other calibers and can hold more rounds in its magazine compared to others of similar size.

The .45 ACP round was designed by John Browning, who designed several firearms including the M1911 pistol (the first semi-automatic pistol) and the M2 machine gun. It was adopted by the U.S military in 1911 as a replacement for their Colt Model 1873 revolvers chambered in .45 Colt/.40 S&W cartridge combo (.45 ACP).

Another major advantage is that this particular caliber has been proven effective at stopping threats at close ranges as well as long ranges (depending on your bullet weight and gun configuration).

Another major advantage is that this particular caliber has been proven effective at stopping threats at close ranges as well as long ranges (depending on your bullet weight and gun configuration).

The 9mm cartridge is one of the most popular handgun cartridges in use today for self defense, hunting, target shooting and competition shooting purposes. The round has a significant history of success throughout its existence. It’s also extremely affordable compared to other calibers on this list!

When faced with a deadly situation, having more bullets available can mean the difference between life and death

When faced with a deadly situation, having more bullets available can mean the difference between life and death. If you’re defending yourself against an armed attacker, having more rounds to fire at your assailant means that you’re more likely to hit them and stop them from harming you. It also gives you better odds of hitting them before they get close enough to harm you in return.

In addition to this advantage in combat situations, 9mm pistols are easier for most people to shoot than larger caliber weapons such as .45 ACP handguns. The lower recoil allows beginners or casual shooters who aren’t accustomed to shooting large calibers like .45 ACPs (or even smaller guns) an opportunity to practice shooting regularly without injuring themselves or developing bad habits from shooting too much at once.

The 9mm is also a more affordable ammunition than .45 ACP. This makes it easier to practice with your pistol and shoot regularly without breaking the bank. When you’re ready to buy more ammunition, you’ll find that 9mm is generally cheaper per round than the larger caliber rounds such as .357 Magnum or .44 Magnum.

In conclusion, there are many benefits to using a 9mm pistol as opposed to some other guns. The 9mm has proven effective at stopping threats at close ranges as well as long ranges (depending on your bullet weight and gun configuration). Another major advantage is that this particular caliber has been proven effective at stopping threats at close ranges as well as long ranges (depending on your bullet weight and gun configuration). When faced with a deadly situation, having more bullets available can mean the difference between life and death. If you’re in a situation where you need to use your pistol, having more bullets available can mean the difference between life and death.