Best 9mm Ammo for a Pistol-Caliber Carbine at Home

What a 16-inch barrel does to 9mm

Pistol-caliber carbines are a favorite on this site for good reason. Our Ruger PC Carbine post lays out the case: a stock, a longer sight radius and less felt recoil make hits easier for most people. Lucky Gunner's Chris Baker calls PCCs "often the best option" for an inexperienced shooter who isn't likely to train often.

The ammo question is where people get tripped up. A longer barrel gives the powder more time to push, so the bullet leaves faster. How much faster? Less than you might think.

Baker's 2023 Lucky Gunner article puts the average gain for semi-auto pistol cartridges at "around 100 to 200 feet per second," roughly 10 to 20 percent, going from a full-size handgun to a 16-inch carbine. He adds that "you get severely diminishing returns with anything longer than about a five inch barrel."

The archived Ballistics by the Inch project shows the same pattern. Its 9mm tables list a Federal 147-grain Hydra-Shok at 951 fps from a 4-inch barrel and 1,073 fps from 16 inches. A Speer 124-grain Gold Dot Short Barrel load went from 1,203 to 1,379 fps. Those are older loads, and the site describes its data as for entertainment, but the shape of the curve is consistent with Baker's numbers.

Why faster isn't always better

A hollow point is a balancing act. It has to open up enough to slow down inside the target, but not so much that it stops short. Modern 9mm loads are tuned for handgun velocities.

Push one faster and it can open wider and quicker. Baker warns that "the bullet might actually perform worse out of a carbine than it would out of a handgun," because it "might expand too much and under-penetrate." He's careful to add that "most modern loads will still do okay." The trick is choosing loads with room to absorb the extra speed.

That points toward heavier, standard-pressure bullets. A 147-grain load starts around 1,000 fps from a handgun. Add 100 to 200 fps and it's still inside the range its designers planned for. A light, +P load that already starts fast has less margin.

The yardstick for all of this is the FBI's 12-inch minimum in ballistic gelatin, adopted after the 1986 Miami shootout, as American Rifleman's history of the protocol explains. A carbine load that opens dramatically but stops at 10 inches isn't doing you favors.

The picks

Best overall: Federal HST 147-grain JHP

Federal's HST is a popular law-enforcement duty load, and the 147-grain version is the natural carbine pick. Ammunition Depot's listing gives 1,000 fps and a pre-skived tip designed to open into petals. Lucky Gunner Labs' handgun testing, from a 3.5-inch M&P9c through four layers of fabric, recorded 15.24 inches of penetration and .606-inch expansion at about 973 fps.

From a carbine, Ammunition Depot's 9mm home-defense guide reports that the 147 HST was tested from a 16.1-inch Ruger PC Carbine and stayed within the FBI penetration standard, citing Lucky Gunner. That's the profile you want: a bit faster, still deep.

Best for: most PCC owners, especially if your handgun shares the same magazines. Skip if: your carbine doesn't feed it reliably; test first.

Ammunition Depot also lists a larger HST 147 battle pack if you want enough for a function test plus a staged supply.

Bonded alternative: Speer Gold Dot 147-grain

Speer's Gold Dot bullets are bonded: Ammunition Depot's listing for the 147-grain battle pack says the lead cores are "bonded to their jackets at the atomic level." Bonding is meant to keep the bullet in one piece, which suits the extra speed a carbine adds. The listing gives 950 fps, the slowest of these picks, which leaves the most room for a longer barrel.

Best for: owners who prefer a bonded bullet, or whose carbine feeds Gold Dot's profile better. Skip if: you already have an HST supply your carbine runs well.

Law-enforcement classic: Winchester Ranger T-Series 147-grain

Ranger T-Series is Winchester's duty line. Ammunition Depot's listing gives 990 fps, a six-petal expansion design and claims of barrier penetration, including auto glass. It's sometimes harder to find than HST or Gold Dot, so it's a pick for people who can buy a decent supply at once.

Best for: owners who already trust Ranger in their duty or carry pistol. Skip if: you can't buy enough to both test and stage it.

Use with care: Speer Gold Dot 124-grain +P

This is an excellent handgun load. Ammunition Depot lists it at 1,220 fps from a 4-inch barrel with bonded construction, and Lucky Gunner Labs recorded 16.78 inches of penetration and .524-inch expansion from a 3.5-inch pistol.

From a carbine it's a different story. Ammunition Depot's home-defense guide, citing Lucky Gunner's 16.1-inch carbine test, reports about 10 inches of penetration and "uncontrolled deformation." That's below the 12-inch minimum. It's one test, but it's exactly the over-expansion Baker warns about.

Best for: your pistol. Skip if: you're choosing a dedicated carbine load. Run a 147-grain load in the PCC instead.

See the Gold Dot 124 +P listing for the specs.

For practice: 115-grain FMJ

You'll want a few hundred rounds of inexpensive ball ammo to learn the carbine. Something like Remington Range 9mm 115-grain FMJ is fine for drills. Don't stage FMJ: it isn't designed to expand, so it tends to penetrate further than a hollow point.

One load or two?

A big selling point of guns like the Ruger PC Carbine is sharing magazines with a pistol. It's tempting to run the same ammo in both.

That works well with 147-grain HST, Gold Dot or Ranger, which perform in a handgun and leave margin in a carbine. It works less well with light +P loads, which are tuned to the handgun. If you prefer a fast load in your pistol, keep a separate, clearly labeled box for the carbine. Our HST 124 nightstand post covers the pistol side.

How to test a carbine load

1. Buy at least 100 rounds of the load you plan to stage. Defensive ammo is expensive, but a function test isn't optional.
2. Run it through every magazine you'll keep with the carbine, loaded to full capacity.
3. Check the point of impact. Heavier bullets may hit differently than your 115-grain practice ammo. Confirm at indoor distances, and at the longest distance you can imagine on your property.
4. Watch for feed issues in the first round of each magazine and the last.
5. Record what you chose and when you bought it, then rotate the staged ammo every year or so by shooting it in practice.

Remember that 9mm from a carbine still goes through walls. Baker writes that "most pistol bullets will sail right through ten or more layers of drywall before stopping." Load choice doesn't change that. Planning your position and backstops does; see our 9mm and walls post.

The bottom line

A 16-inch barrel adds 100 to 200 fps to most 9mm loads. Heavy, standard-pressure hollow points handle that best. Start with Federal HST 147 in a carbine like the Ruger PC Carbine, use Speer Gold Dot 147 or Winchester Ranger 147 as alternatives, and save the fast +P loads for the pistol. Then test it in your gun. For everything else, Ammunition Depot's 9mm category has the full range.

Editorial note: This is an independent editorial overview built from manufacturer specifications, retailer listings and published sources. We have not performed hands-on testing of the products discussed, and nothing here is a performance guarantee. Verify specifications, compatibility and the law where you live.

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