Pocket 9mm vs 380: Which Cartridge Reigns Supreme?

When it comes to self-defense, having the right cartridge can make all the difference in a life-or-death situation. Two popular options are the 9mm and .380 ACP, but which one is better suited for your needs? In this article, we'll explore the key differences between these two cartridges and help you decide which one is right for you.

First and foremost, it's important to understand that penetration is a crucial factor in defensive shooting. Most serious ballistic studies have shown that modern 9mm defensive loadings hit the sweet spot of penetration, expansion, and weight. However, this doesn't mean that .380 ACP cartridges are inferior. In fact, they offer some unique advantages.

One major advantage of .380 ACP cartridges is their reduced recoil. This makes them a great option for those with hand strength issues or arthritis, who may find it difficult to control larger 9mm pistols. The SIG P365 platform, which has recently been introduced in .380 ACP, is an excellent example of this. With less recoil comes less terminal performance, but this can be mitigated by choosing the right cartridge.

The P365-380 pistol is a new addition to the P365 line and features a polymer frame with excellent ergonomics. The grip frame is designed to place the shooter's hands high up on the gun due to the shape of the backstrap and the undercut trigger guard. This makes it easy to control, even for those with smaller hands.

In terms of dimensions, the P365-380 pistol measures 5.8 inches long, 1 inch wide, and 4.2 inches tall. It handles well thanks to its ergonomic grip frame, full-diameter texture, and cocking serrations fore and aft.

During my review, I put 400 rounds through the P365-380 without any issues. The only minor problem I encountered was two failures to go into battery in the first 50 rounds, but this issue disappeared after that. This is likely due to the straight shot to the chamber design, which eliminates any potential feeding issues.

In conclusion, while both the 9mm and .380 ACP cartridges have their advantages, they also have some key differences. The P365-380 pistol is an excellent option for those who want a smaller, more controllable cartridge with reduced recoil. However, if you're looking for maximum penetration and terminal performance, the 9mm may still be the better choice. Ultimately, it's up to each individual to decide which cartridge best suits their needs and preferences.

In this review, I didn't even want to write about the P365-380 because my mind was made up that the only acceptable chambering for the P365 was 9mm. However, after testing this pistol, I've come to realize that it's a great option for those who want a smaller, more manageable cartridge with reduced recoil. The SIG P365 platform has been written about ad-nauseum, but this review highlights the unique benefits of the .380 ACP chambering in this pistol.