10mm Auto Ammo.
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Hornady Critical Duty 10 mm Auto Nickel Plated Brass FlexLock 175 Grain 20 Rounds
10mm Auto is the hard-hitting semi-auto cartridge that hunters, hikers and serious handgunners trust when 9mm is not enough. It pushes heavy bullets fast, which makes it a favorite for backcountry defense and handgun hunting, while full-power loads still fit in a standard-size pistol. At Gunners Outlet we stock 10mm Auto ammunition from 170 to 200 grains, including FMJ for training and JHP for defense, from brands like Federal, Hornady and PMC. Order online and we ship fast from New Hampshire. Every listing shows the price per round, so you can compare loads at a glance.
What to Know About 10mm Auto Ammunition
The 10mm Auto debuted in 1983 and briefly served with the FBI before the shorter .40 S&W replaced it. Shooters never stopped loving it: a full-power 10mm load delivers more velocity and energy than .40 S&W or .45 ACP from a pistol, with a flatter trajectory for longer shots.
Most 10mm Auto ammo falls between 170 and 200 grains. Lighter 170 to 180 grain loads are fast and versatile for self defense and target work. Heavier 200 grain FMJ or hard cast bullets are the choice for deep penetration in woods carry, where you may face large animals.
Not every box of 10mm is loaded the same. Some brands make milder "FBI-style" loads that feel close to .40 S&W, while others run near the top of the pressure limit. If recoil control matters to you, start with a moderate FMJ for practice, then confirm your carry load runs reliably in your pistol before trusting it in the field.
10mm for Hunting and the Backcountry
With the right bullet, 10mm Auto is a capable handgun hunting round for deer and hogs at short range, and it is a popular sidearm for hikers and anglers in bear country. For those jobs, many shooters prefer heavy hard cast or flat-nose FMJ bullets that penetrate deep and straight instead of expanding early.
For training, a mild FMJ load saves money and lets you shoot longer sessions without fatigue. Recoil from a full-size 10mm pistol is firm but very manageable, and the cartridge also shines in pistol caliber carbines, where its velocity climbs even higher.
10mm Auto Ballistics Table
| Bullet Weight | Bullet Type | Loads | Brands | Price From |
|---|---|---|---|---|
| 170 gr | JHP / Hollow Point, FMJ | 2 | 2 | $0.42/rd |
| 175 gr | — | 1 | 1 | $1.41/rd |
| 180 gr | FMJ, JHP / Hollow Point | 4 | 3 | $0.54/rd |
| 200 gr | FMJ | 1 | 1 | $0.66/rd |
Frequently Asked Questions
10mm auto vs .40 s&w: which is better?
10mm Auto is more powerful, while .40 S&W is easier to shoot and fits smaller pistols. The .40 is essentially a shortened 10mm, so 10mm pushes the same bullets faster with more energy. Choose 10mm for woods carry and hunting, .40 S&W for duty and concealed carry.
10mm auto vs 45 acp: which is better?
10mm Auto hits harder and shoots flatter, while .45 ACP offers softer, slower recoil. A typical 10mm load carries noticeably more energy than a standard .45 ACP 230 grain round. For backcountry defense 10mm has the edge; for comfortable range shooting .45 ACP is hard to beat.
10mm auto vs 44 magnum: which is better?
44 Magnum is the more powerful round, but 10mm Auto gives you more capacity in a semi-auto pistol. A 44 Magnum revolver delivers more energy for large game, while a 10mm pistol carries 15 or more rounds with faster follow-up shots. Many hikers pick 10mm as the practical compromise.
What is the best 10mm auto?
The best 10mm Auto ammo depends on use: FMJ for practice, a quality JHP for self defense, and heavy hard cast or FMJ loads for bear country. Whatever you choose, test it in your own pistol to confirm reliable feeding and accuracy.