You can’t go wrong with either the Glock 19 or the Glock 23. Both are superb choices for an everyday carry (EDC) piece and both were made by the same company known for their guns’ reliability.​

In a recent article, we compared two Glock pistols both chambered for the .40 S&W in an attempt to help our readers decide which for them would be the better fit. We pitted the larger and slightly more accurate Glock 22 against the slightly smaller but more easily concealable Glock 23.

We determined that except for a few use case scenarios where the Glock 22 will be appropriate, the Glock 23 is going to be the superior choice in most situations.

But what if we compare the Glock 23 against another Glock pistol that has the exact same specs but is chambered instead for the smaller and faster 9x19mm Parabellum (more commonly referred to as the 9mm)? Will the Glock 23 still come out on top?

THE 9X19MM PARABELLUM

The .355 caliber round commonly referred to today as 9mm or “9 mill” has been around for more than a century. Since it came out in Germany in 1902, it has seen use in countless wars and had been chambered in a lot of different handguns and submachine guns (SMGs).

Its popularity has never diminished and until today, most countries’ law enforcement and military still use it in their sidearms and SMGs, a testament to its effectivity. Here are some of the reasons why:

• The 9mm offers superior velocity and accuracy compared to other common handgun calibers. The 9mm appears puny next to the big fat .45 acp, but the 9mm brass is rated for SAAMI pressures of up to 35,000 psi (240 MPa), which makes it 60% stronger than the .45 acp brass that has a SAAMI pressure limit of only 21,000 psi (140 MPa).

• Since its case can withstand significantly higher pressures than most other handgun calibers, the 9mm is capable of relatively flatter trajectories at longer distances, making the 9mm rounds very accurate.

• In ballistics testing, bullets with smaller diameter often offer better penetration compared to ones with larger diameter because they’re lighter, move faster and have a smaller surface area. This is why the 9mm offers great penetration — so great in fact that it can overpenetrate.

• Since the 9mm bullet’s diameter measures only 355/1000 of an inch, the small footprint also allows for higher magazine capacities without the magazine having to be stretched longer. This is why it is not uncommon to see a ton of differently designed double-stack semi-auto pistols being marketed as “subcompacts” (i.e. they’re really tiny) that have magazine capacities of 13 rounds or so (e.g. Springfield Armory’s XD Subcompact).

THE TALE OF THE TAPE

The tables above show that both the Glock 19 and the Glock 23 use the same size frame and thus, almost everything about the two is the same.

Concealability shouldn’t be an issue for both these pistols but if you want to know what your best CCW holster options are, check out this exhaustive list of holsters we created.

The only real differences between the two are the calibers they use and the maximum number of rounds that can be loaded in their respective magazines.

AMMO CAPACITY

The Glock 19 comes with two 15-round stock mags while the Glock 23 comes with two 13-round stock mags.

There isn’t really a world of difference between 15 rounds of 9mm vs. 13 rounds of .40 S&W. For years, both have been proven effective for self defense.

Even if you’re facing a mob of, say, five to six people intent on disemboweling you (which is very unlikely if you’re not in the military or law enforcement), 15 rounds of 9mm or 13 rounds of .40 S&W are plenty of firepower. You can always reload with a fresh mag in the event that you’ll need more.

SO, WHICH IS BETTER?

Since the Glock 19 and the Glock 23 are practically the same pistols, this comparison will revolve around the two different calibers they use, how effective each can be for self defense situations and how each can affect their respective gun’s handling and accuracy.

9MM VS. .40 S&W: WHICH IS THE BETTER SELF DEFENSE WEAPON?

As mentioned in my Glock 22 vs. Glock 23 comparison, the .40 S&W is a great option for self defense. It offers the best of both the 9mm and the .45 ACP and thus is a compromise between both.

But there were a few things not mentioned in that article.

FELT RECOIL

A gun’s recoil determines how fast you can fire follow-up shots and how fast you can line up the sights to acquire a new target. A softer recoil lets you do these things faster. In self defense situations, your life may depend on how quickly and effectively you can do these things.

The .40 S&W tends to have a very snappy recoil. In comparison, the 9mm doesn’t have as much recoil — only comparable to a .38 Special fired in a 4-inch barrel alloy revolver. The lighter weight of 9mm bullets doesn’t “kick” like the .40 S&W’s heavier bullets.

Personally, I find the .40 S&W’s recoil to be relatively manageable, and the 9mm’s recoil to be significantly more manageable. I would further argue that both are nothing compared to the .44 magnum rounds shot through a 6-inch Taurus Raging Bull — which just kicks like a damn mule.

Even the .357 magnum’s recoil, especially when fired from a 2-inch snubnose with slim grips, is just plain unmanageable. It’s so bad that it hurts my hands after I fire 10 rounds of hot-loaded 158 grains moving at speeds of around 1,100 fps out of a short barrel.

I would be a happy camper with either the Glock 19 or the Glock 23 for EDC without worrying about recoil. But your mileage may vary.

GLOCK 19: THE BETTER SHOOTER

If recoil is going to be an issue, the Glock 19 will always be the better option. But if you think with some range time, you can learn to handle the snappier recoil of the Glock 23, it will be the better option.

If it’s your first time to buy a semi-auto pistol and you haven’t tried shooting either caliber, go to your nearby range and try shooting their rental guns in both the .40 S&W and the 9mm to see which caliber you can handle better.

GLOCK 23: THE CHEAPSKATES’ DELIGHT

If you’re carrying the Glock 23, you can load it with whatever .40 S&W ammo you can get your hands on. Full-metal jacket (FMJ) should be okay because by virtue of its inherently larger bullet diameter, the .40 S&W will make bigger holes than the 9mm.

And if .40 S&W FMJs are okay, .40 S&W JHPs will be better as it makes even bigger holes compared to 9mm JHPs.

But if you’re loading your Glock 23 with FMJs, just make sure you get the flat nose (FMJ-FN) type bullets. The wider the meplat (i.e. tip of the bullet), the more violent tissue destruction, which results to faster bad guy incapacitation.

FMJs are usually much more affordable than jacketed hollow points (JHPs). If money or ammo availability will be an issue, the Glock 23 will be the better choice.

AVAILABLE LOADS FOR SELF DEFENSE

There are a ton of ammo options for the 9mmand the .40 S&W.

If you’re carrying the Glock 19 or any 9mm handgun for that matter, it is highly recommended that you load it with JHPs, as FMJs tend to overpenetrate because of the 9mm’s blistering speeds.

You don’t want over-penetrating bullets hitting innocent bystanders when you have to defend yourself against an armed attacker.

FMJs for the Glock 23 will be fine in most cases, but if you have the money, why settle for FMJs when you can buy even more effective JHPs?

Speer Gold Dots, Federal Hydra-shoks and Remington Golden Sabers are some of the best ammo choices that are available almost everywhere, but you can buy any JHPs as long as they’re from reputable companies, e.g., Winchester, Blazer, etc.

CALIBER CONVERSIONS

The Glock 23 can be converted easily from .40 S&W to 9mm, but the Glock 19 not so much (it’s possible to convert it to .40 S&W but it’ll be way more difficult).