.40 S&W Ammo Guide: Picking the Right Load for Your Glock 22

ByThe Answerlode Editorial Team

Choosing the Right Ammunition for Your Glock 22

The Glock 22 chambered in .40 S&W sits in a unique spot in the defensive handgun world. It delivers more power than 9mm while managing recoil better than 10mm, and it’s accurate enough for duty use. But the ammunition you choose matters more than most shooters realize.

Understanding .40 S&W Ballistics

The .40 S&W was designed as a compromise. The FBI spent years using 10mm and found it too snappy in service weapons. So they worked with gun manufacturers to develop a cartridge that would fit in 9mm-sized frames while delivering significant power. The result is a round that generates roughly 5 to 6 foot-pounds of recoil energy in typical loads—more than 9mm, less than half what 10mm delivers.

The recoil character of .40 S&W deserves its own explanation. Where .45 ACP shooters feel a gentle push, and 10mm shooters feel a sharp crack, the .40 produces what experienced shooters call “snap.” It’s fast and snappy, mostly because the cartridge is operating at high pressure relative to its size. You feel it in your hand quickly. This isn’t bad—just different—and it affects how you choose ammunition.

Self-Defense Loads Worth Considering

Speer Gold Dot (165gr or 180gr)

Speer Gold Dot rounds remain the industry benchmark for defensive ammunition. The 180-grain version fires around 1,025 feet per second and produces roughly 420 foot-pounds of energy. More importantly, testing shows consistent expansion beyond 150 percent diameter increase, with full bullet weight recovery in ballistic gelatin and penetration depths around 16 inches—well within the FBI’s preferred 12 to 18-inch standard.

Law enforcement agencies use Gold Dots because they’re reliable. They expand when they hit, they penetrate deep enough to reach vital organs through various barriers, and they don’t over-penetrate into surrounding areas. For the Glock 22, 180-grain Gold Dots represent a solid middle ground.

Hornady Custom XTP (155gr)

The 155-grain XTP from Hornady offers a different philosophy. At 1,180 feet per second, it’s faster than Gold Dots and carries 475 foot-pounds of energy. The lighter bullet means flatter trajectory at longer ranges and faster follow-up shots in rapid-fire strings. The trade-off is slightly shallower penetration, though testing still shows reliable expansion and adequate depth for defensive use.

Some shooters prefer the 155-grain load because it runs flatter and splits the difference between 9mm-speed and full-power .40 loads. It’s worth testing if you do a lot of shooting beyond 15 yards.

Federal HST and Premium (180gr)

Federal Premium HST ammunition is what many law enforcement departments trust after years of real-world testing. The 180-grain HST rounds deliver heavy penetration with reliable expansion, and they come from a manufacturer with decades of ballistic research backing them. Federal’s testing standards are well-documented, and their ammunition passes the FBI protocol consistently.

Target and Practice Ammunition

Not every shot needs to be a defensive round. Federal American Eagle full metal jacket rounds are economical for range work. They’re clean-shooting and reliable, though the solid construction means no expansion—exactly what you want when practicing at paper targets or steel. Winchester ball ammunition serves the same role and works fine for volume shooting sessions.

The key difference: practice ammo should run flawlessly through your weapon so you trust your gun’s reliability. It doesn’t need to expand or penetrate ideally. Once you’ve verified your defensive round works in your specific Glock, you can shoot cheaper ammunition for training without worry.

Testing Your Chosen Load

Before carrying any round, fire at least 50 rounds through your gun to confirm zero malfunctions. Feed them through different magazine positions. Shoot them at your expected defensive distances—typically 5 to 15 yards. Watch how your gun’s sights track. Check for reliability in the specific barrel and gun you own; every firearm is unique, and ammunition that works in someone else’s Glock 22 might cycle differently in yours.

The recoil snap of the .40 means fast follow-ups are possible, but also that your chosen defensive load should be something you shoot regularly enough to be comfortable with. One magazine per month at your local range is minimum. One box is better.

Why Grain Weight Matters

In .40 S&W, ammunition weights typically range from 155 to 180 grains. Heavier bullets (180gr) typically hit harder and penetrate deeper. Lighter bullets (155gr) shoot flatter and allow faster follow-up shots because recoil management is easier. Neither is universally “better”—they’re trade-offs.

If you spend time at the range, carry the heavier load. It’s the proven standard among defensive professionals. If you’re recoil-sensitive or shoot a compact .40, the lighter load gives you faster shot placement without sacrificing defensive capability.

The Bottom Line

Speer Gold Dot in 180 grains remains the default choice for good reason. It’s widely available, well-tested, and used by departments across the country. Federal HST is equally valid if you find it at a better price. Hornady XTP works if you prefer the flatter trajectory of a lighter bullet. Any of these will outperform you in a critical moment if you practice and trust your gun.

The ammunition doesn’t win the fight—your training does. Pick a defensive load that your gun runs flawlessly, that you can shoot accurately, and that you can train with regularly. Then invest the money and time in practice, not in endlessly debating which round is theoretically best.

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