When you enter a legit gun giveaway online for a new semi-automatic pistol at www.wintheguns.com, you are often faced with a choice of calibers. Two rounds dominate the self-defense landscape: the ubiquitous 9mm Luger and the hard-hitting .40 S&W.
The debate between these two is one of the oldest in the shooting world. Which one should you prioritize winning? Which one is the right fit for your Everyday Carry (EDC) system?
This guide breaks down the science, the capacity trade-offs, and the modern performance metrics, giving you the expert insight you need to choose the best premium firearm for your needs.
1. The Tale of the Tape: Core Differences
The .40 S&W (Smith & Wesson) was developed in the early 1990s as a compromise—offering power superior to the 9mm while retaining a more manageable recoil than the large .45 ACP. The 9mm Luger (or 9x19mm Parabellum) is a global standard, favored for its versatility and capacity.
| Feature | 9mm Luger | .40 S&W | The Winner for EDC |
| Capacity (Glock 19 vs. 23) | 15+1 Rounds | 13+1 Rounds | 9mm (Higher round count in same size frame) |
| Recoil Profile | Milder, softer push | Sharper, “snappier” impulse | 9mm (Better for quick follow-up shots) |
| Terminal Ballistics | Excellent expansion with modern ammo | Larger frontal diameter, deeper penetration | Tie (Modern ammo minimizes the difference) |
| Cost & Availability | Cheaper, more common for training | More expensive, less common globally | 9mm (Allows for more practice) |
2. Recoil & Shootability: The Deciding Factor
In any self-defense scenario, shot placement is paramount. This is where the 9mm gains a decisive edge over the .40 S&W, particularly in the micro-compact and compact pistols often used for EDC.
The .40 S&W typically generates about 25% more felt recoil than the 9mm. In a full-sized, heavy pistol, this difference is marginal. However, in a small, lightweight carry pistol—like a Glock 43X or a Sig P365—that increased energy translates into a significant muzzle flip.
- 9mm Advantage: Less muzzle flip allows the shooter to reacquire the target faster, drastically improving the speed and accuracy of follow-up shots. For newer shooters or those with smaller hands, the softer-shooting 9mm is easier to train with and master.
Industry Trend Alert: Many U.S. law enforcement agencies, including the FBI, have officially switched back to the 9mm from the .40 S&W. The reason? The 9mm’s higher capacity, lower recoil, and modern ammunition performance result in better officer shootability and accuracy under stress.
3. Capacity vs. Stopping Power: The Modern Truth
For years, the .40 S&W was touted as having superior “stopping power.” While it fires a larger, heavier bullet, the development of modern ammunition has nearly eliminated the practical difference.
- Modern 9mm Performance: Today’s high-performance 9mm hollow-point (HP) ammunition is engineered for controlled expansion and adequate penetration. These rounds perform reliably through common barriers (clothing, drywall) and often achieve terminal performance closely matching that of the .40 S&W.
- Capacity Matters: Given the negligible difference in terminal effects, capacity becomes the dominant factor. In a multi-threat scenario, having two or three extra rounds in the magazine (which the 9mm typically allows in the same-sized pistol) can be critical.
When evaluating a firearm sweepstakes prize, if the pistol is available in both calibers, the 9mm generally offers the best combination of shootability, capacity, and cost-effective training.
4. Why We Feature Both Calibers at www.wintheguns.com
While the 9mm dominates the EDC market, we continue to feature high-value .40 S&W and .45 ACP pistols in our gun contests for those who prefer the traditional, heavy-hitting feel of a larger round.
Regardless of your choice, remember that every contest linked through www.wintheguns.com is fully vetted for legitimacy, ensuring that the FFL transfer process is the mandated, legal path to claiming your prize.
The final answer is personal: Choose the caliber you can shoot most accurately and comfortably, and that you can afford to practice with regularly. If that’s the 9mm, great. If you prefer the punch of the .40 S&W and can manage the recoil, that’s a perfectly viable defense tool.
I run and reload them both.
Hits win. Hitting faster wins more. Most people can hit faster with 9mm. At the range an average civilian gun fight happens, you will not win if you have to change mags so capacity is king. I spent 2 plus hours on a flight talking with an ME from a liberal hellhole. He said he could not tell the difference between 9mm and 45 ACP unless a bullet was in the body to be recovered. Damage and permanent wound track looked the same. I switched to 9mm afterwards for carry. I shoot a lot smaller splits with 9mm. I train more with 9mm due to cost differences. Easier on my joints now that I am older. Has been a win for me.
I favor the 9
I own both, and love both calibers for what they offer. As someone who runs a lot of rounds, I find it cheaper to shoot 9mm, but for self defense I train and carry my 40!