9mm Luger ammo guide
The 9mm is the most widely used handgun cartridge in the United States and around the world. Its popularity keeps it among the most available and most competitively priced calibers, which is why a little shopping goes a long way.
What it is
The 9mm Luger, also called 9x19mm Parabellum, was designed by Georg Luger in the early 1900s. It's a rimless, straight-walled pistol cartridge with a bullet of about 9mm (.355") on a 19mm case. Today it's the standard chambering for most full-size, compact, and subcompact service and carry pistols, and for many pistol-caliber carbines.
Don't confuse it with 9mm Makarov (9x18), .380 ACP (sometimes sold as "9mm Kurz" or "9mm Short"), or 9x21mm. They're different cartridges and aren't interchangeable.
Common bullet weights
| Weight | Typical traits |
|---|---|
| 115 grain | The most common, and usually the cheapest, practice weight. Lighter and faster, and many shooters feel a slightly sharper recoil. |
| 124 grain | A middle weight common in both practice and defensive loads, close to the original military loading. |
| 147 grain | Heavier and slower, and usually subsonic. Many shooters describe the recoil as more of a push. A popular choice with suppressors. |
You'll also see loads marked +P or +P+. These are loaded to higher pressure. Only use them if your firearm's manufacturer approves them, and expect more recoil and wear.
Range ammo vs. defensive ammo
Range and practice
Practice ammo usually has full metal jacket (FMJ) bullets. Brass cases are the most common and can be reloaded. Steel and aluminum cases often cost less but generally can't be reloaded, and some ranges don't allow steel-cased ammo or steel-core bullets. Remanufactured ammo (made with once-fired cases) is often cheaper. Quality depends on the maker.
Self-defense
Defensive loads use jacketed hollow points (JHP) or other expanding bullets designed to expand and limit over-penetration. Many people look for loads that perform well in standardized gel testing, such as the FBI protocol, which looks for roughly 12 to 18 inches of penetration. Defensive ammo costs several times more per round than FMJ. It's worth running at least a few magazines of your carry load through your own gun to confirm it feeds reliably.
What drives price per round
- Quantity. 1,000-round cases almost always cost less per round than 50-round boxes, and many retailers offer free shipping above a set order total.
- Case material. Steel and aluminum are usually cheaper than brass. Remanufactured is often cheaper than new.
- Bullet type. FMJ is the cheapest. Hollow points and premium bonded bullets cost much more.
- Shipping and fees. Ammo is heavy, so shipping can add a lot to a small order. Some retailers also add credit-card surcharges or minimums for free shipping. That's why we focus on delivered cost per round.
- Demand. Prices rise and stock tightens during buying surges, then ease once supply catches up. Price history helps you tell a real deal from a normal price.
Tip: To compare a box and a case fairly, divide the total delivered cost (price + shipping + fees) by the number of rounds. A case with free shipping often beats a "cheaper" box once shipping is included.
This guide is general information, not legal or safety advice. Always use ammunition that matches the markings on your firearm's barrel or slide and the manufacturer's recommendations, and follow the laws where you live.