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.40 S&W vs 9mm vs .45ACP | Which of The Three Calibers Will Get the Job Done




9mm vs .40 S&W vs .45 ACPs are the most obvious choices when looking for handguns. While all three have their pros and cons, this article will surely help you find which one fits you best.

Who knows you might end up getting all?

RELATED: The Best Handgun Caliber

Here’s Our Practical Overview of 9mm vs .40 S&W vs .45 ACP

For Home DefenseMan in a high crime area placing a handgun into the drawer of a bedside table in readiness to defend himself during a home invasion | 9mm vs .40 S&W vs .45

The main reason why we all have guns in the first place is home defense. Many of us rely on a shotgun or an SBR, but most of us would own and keep at least one handgun at home. Countless 9mm vs .40 S&W vs .45 tests showed how each round performs.

From cinderblocks, makeshift walls, to bricks and concrete, each round delivers varying results. When intruders come with established aggression, we all think of stopping power. But we should also consider ammo capacity and collateral damage.

The hefty .45 punches big holes and pulverizes cinderblocks. It will take down intruders for sure, but do we want all that damage? A fat round also gives us less magazine capacity.

Plus, we all know how cumbersome a double-stack .45 pistol could be in a gunfight. The fast-moving 9mm goes through and through almost anything found at home. 9mm also guarantees more mag capacity. More rounds give you more chances at hitting your target.

The 9mm also gives off the least recoil. You get quicker acquisition at follow-up shots, giving you more edge during a CQB gunfight. We all know the .40 S&W to be good at both follow-up shots and stopping power.

But, depending on whom you ask, the round is inconsistent and gives different results. Most people say that the .40 fires like a 9 and hits like a .45.

So, 9mm vs .40 S&W vs .45 for home defense?

Our practical advice: Get the round that your wife or kids could be comfortable shooting with.

For BeginnersWoman with pistol weapon in hands at shooting range with target | 9mm vs .40 S&W vs .45

We always tell someone who is about to try out shooting guns to start small. We all know of kids having a good time with the .380 and .22 of their parents. But for the long haul, they’d want a more popular caliber.

We lead them in on the 9mm vs .40 S&W vs .45 discussion. While accuracy remains a contention, let’s consider other crucial factors. The 9mm will not alienate the noob as it recoils less and gives more magazine capacity.

More mag cap means less time reloading and more time shooting. That translates to more fun downrange. The .40 does the same, only harder. This caliber recoils harder, has lesser ammo capacity.

It could also get erratic and inconsistent in untrained hands. That doesn’t sound like fun at all. As for the .45, just tell the new guy that the boys in the last world war had to learn firing this caliber in basic training. Tell him that this round won him the freedom he enjoys now, and he won’t bother about the recoil.

9mm vs .40 S&W vs .45 for beginners?

Our practical advice: Start small, and work your way up to get the most fun.

RELATED: 5 Calibers For Self-Defense | Self-Defense Firearms

For Primary / Secondary WeaponCloseup of two pistols handguns trigger for shooting self defense or military | 9mm vs .40 S&W vs .45

The 9mm vs .40 S&W vs .45 contest also has its deep roots in real-world use. In 2015, the FBI ditched the .40 S&W, the chosen round for their use, and went to 9mm.

They have practical reasons to do so. Most local law enforcement prefers the .40 as their primary carry round. The police rely on its stopping power and reliability during gunfights.

Many still prefer the 9mm for the most magazine capacity and quicker follow-ups. The military employs mostly 9mm and .45 as their secondary carry round.

But with perps getting armed with better firepower, the handgun you’re carrying is your best tool. The key to sending more rounds on target is quick acquisition at follow-up shots.

One critical hit to the chest with a 9mm is still better than a missed .50 BMG shot. If you have more rounds, the better your chances are at taking down your target.

9mm vs .40 S&W vs .45: which should go as your primary or secondary weapon?

Our practical advice: Get the one that gives you better follow-up shots.

Concealed CarryYoung woman holding 9mm handgun in purses for concealed weapons | 9mm vs .40 S&W vs .45

9mm vs .40 S&W vs .45: which round should go in my CCW? You’d think that this is easy. The smallest round should be the best choice for concealed carry.

Is it? With concealed carry weapons getting smaller, should the round you carry still matter? Of course, it does. The smaller and lighter the gun, the more recoil you’d have to deal with.

And this is how we factor in the application of your CCW round of choice. If your CCW is your backup, you should use the same round as your primary. Consider using interchangeable magazines as well.

If your CCW is also your main weapon, then choose the round that is most capable for you given your circumstance.

Our practical advice: Say, you live in a place where violent men get as big as bears, get a bear-stopping round.

If the bad guys are like tiny ninjas, then get a fast-moving round that also gets you to shoot follow-ups faster. If they come anywhere in-between, get the .40.

And to further bring light to the 9mm vs .40 S&W vs .45 debate, here’s Guns, Gear & On Target Training, LLC’s take on the matter:

The 9mm vs .40 vs .45 debate is still going on and there are still no clear winners. All three rounds are capable and reliable. Choosing one only boils down to use. Heck, a lot of us own and fire all three.

Which is your favorite round and why? Let us know your thoughts in the comments section below.

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  1. Doug Pendarvis

    May 28, 2021 at 2:00 PM

    That woman in one photo shows her putting a pistol into her purse with her finger on the trigger. What an idiot. Is she planning on shooting a hole in her purse. It will happen if she doesn’t take her finger off the trigger while putting the gun in her purse. That is an accident waiting to happen. Safety first, period.

  2. Hatman1793

    May 13, 2021 at 9:00 AM

    A very disappointing story. I learned nothing, and none of the advice pointed to the question posed by the purpose of the article.
    Pointless. Posting the opening picture of 22LR cartridges was a hint. Offer me the same amount of $$$ the anonymous author was paid for this dreck & I could make it better.

  3. Jay

    May 13, 2021 at 5:22 AM

    I trained with the 1911 .45 in the Army and loved it. On discharge I bought a couple of .45s and carried one for years. My dad had an old 9mm pistol that I grew up shooting and then inherited. So I also bought a couple of 9mm pistols (and a carbine) and I now carry one of them. With the advancements in 9mm ammo they make the most sense to me at this time.

  4. DickC

    May 12, 2021 at 8:34 PM

    As a retired gunsmith I have tried them all under many conditions so here is my opinion; the 9mm is a good round, so is the 9×18 Mak. for shooting at close range at people with no body armor and at windshields straight-on.
    The.45 is a brute for stopping power, the military used them, but I’m going to be breaking concrete blocks any ways soon and the recoil makes me have to think before shooting another round! So my preference is the .40S&W, it has plenty of hitting power, reasonable recoil, the pistols will hold 16-18 rounds and not to heavy! A .25 auto, double tap, will even be the highlight of some assholes day!

  5. BAMF Inc.

    May 12, 2021 at 4:59 PM

    Bullshit on all your test. Colt 1911 A-1. It is and will always be superior above the rest. Since when in the hell should anyone worry about to much damage in the middle of a gun battle. Also if you are again worried about not having the capacity in your mag then wake up and use a higher capacity mag. Well take it for what it’s worth but I’ve proven both of my statements. I also have the medals to prove it.
    Thank you and be safe

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