FMJ vs. JHP: Which Ammo Should You Buy, and When?

Walk into any gun shop or scroll any ammo deal list and you will see two abbreviations over and over: FMJ and JHP. They are not competing products so much as tools for different jobs. Knowing which one you need saves money and keeps you from carrying the wrong load.

What FMJ means

FMJ stands for full metal jacket. A lead core is wrapped in a thin copper or copper-alloy shell, usually leaving the base exposed. The rounded nose feeds smoothly in almost every gun, and because the bullet is simple to make, FMJ is the cheapest centerfire ammo you can buy. When you see 9mm under 25 cents a round, it is almost always FMJ.

FMJ is built to hold its shape. That is great for punching paper and steel, but it means the bullet tends to pass straight through soft targets without expanding.

What JHP means

JHP stands for jacketed hollow point. The nose has a cavity that is engineered to open up when the bullet hits a soft, wet target. As it expands, it slows down faster, transfers more energy and is less likely to exit and keep going. That is why hollow points are the standard for law enforcement duty use and for self-defense carry.

Modern defensive loads such as Federal HST, Speer Gold Dot, Hornady Critical Duty and Winchester PDX1 are designed to expand reliably even after passing through heavy clothing. The engineering costs money, so expect to pay two to three times as much per round as range FMJ.

Where each one belongs

• Range practice and training: FMJ. It is affordable enough to shoot a lot, and volume is how you get better.
• Carry and home defense: a quality JHP from a major maker.
• Competition: usually FMJ or a coated lead load, depending on the match rules and your gun.
• Indoor ranges: check the rules. Some ranges ban steel-cased or steel-core ammo; a few restrict certain bullet types.

The smart way to buy both

Most shooters should keep two stocks. Buy practice FMJ by the case when prices dip, because a 1,000-round case is almost always cheaper per round than boxes of 50. Then buy a smaller supply of your chosen defensive JHP, enough to fill your magazines, replace it once a year, and run at least a box or two through your carry gun to confirm it feeds reliably.

One tip: try to match bullet weight between your practice and carry ammo. If you carry a 124-grain hollow point, practicing with 124-grain FMJ gives you the closest feel for recoil and point of impact.

Bottom line

FMJ is for shooting a lot without going broke. JHP is for the moments that matter. Watch our daily ammo deals for both, and stock up on the cheap stuff when the price is right so you can afford the good stuff for your carry gun.