What ammo should you actually buy?

The gun was the decision you researched. Then you got to the ammunition shelf, and there were forty boxes with different letters on them, a ten-fold spread in price, and nobody to ask.

So here is what ammo to buy for beginners, in one sentence: one box of the plain cheap stuff, in the caliber stamped on your barrel.

That's the whole first purchase. The rest of this explains what the letters mean, what you're paying for when the price jumps, and why "stock up" is the most expensive advice a new owner gets in their first month.

What actually matters when you're starting out?

Three things, and only three.

The caliber has to match. It is stamped on the barrel or the slide of your handgun, and the box has to say the same thing. "9mm Luger" and "9x19" are the same cartridge. ".380 ACP" is not, and neither is ".38 Special." If the two strings don't match, put the box down.

It has to run in your gun. Ammunition and firearms are built to shared published standards. SAAMI, the industry's standards body, publishes voluntary performance standards for pressure and velocity, including Z299.3 for centerfire pistol and revolver ammunition, specifically "to provide safety, reliability, and interchangeability" (SAAMI Standards). That is why a box from one company works in a gun from another. It is also why your own gun's manual, not the internet, is the authority on what it's rated to fire.

You need less of it than you think. More on this below, because it's where the money goes.

Everything else, including bullet weight, brand, and the aggressive font on the box, is a second-year question.

The options, explained

Range ammunition (the labels say FMJ)

This is the cheap, plain-nosed ammunition you will shoot the overwhelming majority of. FMJ stands for full metal jacket, meaning the soft lead core is wrapped in a harder metal jacket. It is sold on two things: price, and feeding without a hitch.

That is what your practice runs on. If you're still learning the fundamentals, this is all you need, and anything fancier is performance you cannot yet use.

Defensive ammunition (the labels say JHP, or say "defense" outright)

Expensive, sold in boxes of twenty rather than fifty, and built against an actual published test.

Since the late 1980s the benchmark has been the FBI's ballistic protocol. Bullets are fired into 10% ordnance gelatin from ten feet, through six test events: bare gelatin, plus five barriers that include heavy clothing, wallboard, 20-gauge steel, plywood, and automotive glass. Each shot is measured for depth of penetration, expansion, and retained weight (Hornady Law Enforcement, FBI Test Protocol).

The scoring is the part that's useful to a buyer. Bullets penetrating less than 12 inches are heavily penalized as inadequate. Bullets penetrating more than 18 inches are penalized for the overpenetration risk. Fourteen to sixteen inches is considered ideal (Speer, How FBI Protocol Testing Changed Ammunition). That same account describes how the protocol pushed manufacturers to redesign defensive bullets to perform against it.

So the price difference is not marketing. Defensive loads are engineered against a specific, published, measurable standard. Range ammunition is engineered to be cheap and to feed, which is exactly the right thing to learn on.

.22 LR

Worth naming because it's the cheapest practice that exists, and because a .22 is easier to learn on. Less noise, less recoil, and less flinch to unlearn later. If you have access to one, use it. It doesn't replace practice with the gun you actually own, but it makes the hours cheaper.

What should you avoid?

Buying a case before you've fired the gun. This is the big one. You do not yet know whether you like this pistol, whether it fits your hand, or whether you'll trade it in six months. A thousand rounds for a gun you end up selling is a thousand rounds you now have to sell too.

Buying defensive ammunition you never shoot. A box of twenty that sits in a drawer is untested in your specific gun. If you're going to carry, or keep a loaded firearm at home, some of that expensive ammunition has to go downrange so you know it feeds. Budget for that.

Panic-buying on a rumor. As of a spot-check dated 22 August 2026, one ammunition market tracker found no shortage: bulk 9mm FMJ at about 27 cents a round, in deep stock at major retailers, with FBI background checks running below the prior year. Its conclusion was that 2026 is "an ammunition price problem," not a scarcity one, driven by copper and brass input costs rather than empty shelves (Popular Ammo, Ammo Shortage Tracker). High prices are a reason to buy less at a time, not more.

At roughly 27 cents a round, fifty rounds runs under fifteen dollars. That's a range session, and that's the purchase.

Ignoring the range's own rules. Many indoor ranges restrict steel-cased or steel-core ammunition, and some prohibit reloads. Read the posted rules or ask at the counter. It's a normal question and nobody will think less of you for it.

What does the law say about buying ammunition?

Federal law sets the floor. Under 18 U.S.C. § 922(b)(1), a licensed dealer may not sell any firearm or ammunition to someone under 18, and may not sell handgun ammunition, meaning ammunition "other than a shotgun or rifle, or ammunition for a shotgun or rifle," to someone under 21 (18 U.S.C. § 922, via GovInfo). In practice a 19-year-old can buy rifle ammunition from a dealer and cannot buy 9mm.

State and local rules sit on top of that floor and they change. Check Oregon's current requirements and your own county before you assume anything, and don't take a national article's word for it. That includes this one.

One storage point is worth carrying home with the ammunition. Oregon Health Authority's firearm safety guidance is to store the firearm unloaded in a lock box or gun safe, use a trigger or cable lock, and "store your gun in a different location than the ammunition" (Oregon Health Authority, Firearm Safety). The ammunition you just bought needs a plan too, and the plan is not the nightstand drawer.

Which should you choose?

For a first purchase: one 50-round box of FMJ range ammunition in your gun's caliber. Not a case. Not a brand somebody swore by on a forum. One box.

Shoot it. See whether the gun runs, whether you enjoy this, whether the caliber is comfortable in your hands. Then buy the second box. By the third or fourth you'll have opinions of your own, which is the point.

If you keep a firearm loaded for defense, add one box of defensive ammunition later, and shoot part of it in your gun before you trust it. Not on day one. Day one is fundamentals, and fundamentals run on cheap ammunition.

If you haven't fired the gun yet at all, the ammunition question is premature. Start with the basics of owning one, and if the mechanics of your particular pistol are still fuzzy, our guide to handgun actions covers what's happening when you pull the trigger.

The short version

Match the caliber on the box to the caliber on the barrel. Buy one 50-round box of FMJ, not a case, because you don't know yet what you'll want. Defensive ammunition costs more because it's designed against a published penetration and expansion standard; range ammunition is designed to be cheap and to feed, which is the right thing for learning. Federal law bars dealers from selling handgun ammunition to anyone under 21. Store the ammunition somewhere other than with the gun.

And if the counter conversation is the part you're dreading more than the shooting, that's what training built for beginners is for. Bring these questions to a training party and ask them out loud, where nobody is selling you anything.