![]() If you’ve ever heard the term “stopping power,” that is most likely referring to a high weight density. The heavy your bullet is, the more impact it will have. There is also the grain, which is used to describe the weight of the bullet. We already know that bullets vary in size and measurement. A cartridge with a circular primer at the center of the casing is centerfire. With a centerfire weapon, the firing pin hits the center primer.Ī small cartridge without any visible primer is most likely a rimfire cartridge. With a rimfire gun, the firearm strikes the rim of the cartridge so that the primer can be ignited. Lastly, the BTHP (Boat Tail Hollow Point) bullet is a boat tail with a hollow point.īy learning about the differences between rimfire and centerfire cartridges, you’ll be able to better grasp how ammo can be differentiated. This helps the projectile to stabilize itself while in flight. These bullets are meant to shoot through thick armor.Ī BT (Boat Tail) bullet means that the rear end of the cartridge has a tapered design. The AP (Armor Piercing) isn’t made out of lead but instead has an alloy core. The core is encased in a strong metal jacket that is left exposed at the front tip. The SP (Soft Point) is a jacketed expanding bullet. Let’s look at some of the most popular types of bullets below. The majority of these types can be described with acronyms. Lastly, the tip of the cartridge is referred to as the projectile.īullets come in a variety of different flavors. There’s also the case, which is usually made out of steel, brass, or nickel. ![]() The primer is the ignition that will help to power the propellant or the explosive. When most people think of a bullet, they’re actually thinking of a cartridge. So if you have a 12 gauge shell, that would be that it’s about 2.5in or 70 MM long. The higher the number, the smaller the diameter of the shotgun shell. When it comes to shotgun shells, we measure those in gauge. For example, 6.55x54mm is actually 6.55mm wide and 54mm long. Everything else is just helping the bullet get there.Īmmo is usually described by using the diameter to length ratio measurement. The bullet is simply the metal projectile that travels through the barrel while that entire unit is referred to as the cartridge.Įssentially, you can imagine the bullet as the object that’s going to hit your target. When someone is talking about caliber, they’re actually talking about the diameter of the barrel. So continue reading, and we’ll walk you through everything you need to know. We understand that there’s a lot going on here, but it’s actually not as complicated as it appears. It should also be noted that bullets and cartridges are not the same things. The first kinds of bullets were muzzle-loaded with a small ball and cap at the tip and a big paper cartridge.Įach type of early bullet has a certain function, such as defense training, hunting, target shooting, and warfare. Interestingly enough, the word “bullet” comes from the Middle French word, “ Boulle,” which stands for small ball. While it’s fairly easy to understand the differences between the various types of guns out there, it’s not so easy when it comes to the different types of ammo. The Different Types of Ammo Explained: An Extensive Guide
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