.40 S&W – Ammo, Pistols, Ballistics & Comparison Guide
The .40 S&W (Smith & Wesson) is a powerful, widely used handgun cartridge that bridges the gap between 9mm and .45 ACP. Originally developed for law enforcement, .40 S&W delivers strong stopping power, heavier bullet weights, and excellent defensive performance, making it a popular choice for duty pistols and home defense.
🔍 Quick FAQs – .40 S&W
Is .40 S&W good for self-defense?
Yes. .40 S&W offers excellent stopping power and penetration, making it a proven defensive cartridge.
Is .40 S&W stronger than 9mm?
Yes. .40 S&W typically fires heavier bullets with more energy, but also produces more recoil.
Is .40 S&W still popular?
Yes. While many agencies returned to 9mm, .40 S&W remains widely available and popular among civilian shooters.
Can you shoot .40 S&W in a 10mm pistol?
Sometimes—but only in firearms specifically designed to safely handle .40 S&W. Never assume compatibility.
Is .40 S&W expensive?
.40 S&W ammo is usually slightly more expensive than 9mm, but cheaper than 10mm Auto.
Magtech Ammunition 40 S&W 165 Grain Full Metal Jacket
In stock
Sellier & Bellot Ammunition 40 S&W 180 Grain Full Metal Jacket
In stock
Sellier & Bellot Ammunition 40 S&W 180 Grain Full Metal Jacket
In stock
Speer Lawman Ammunition 40 S&W 165 Grain Total Metal Jacket
In stock
Speer Lawman Ammunition 40 S&W 180 Grain Full Metal Jacket
In stock
Winchester Silvertip Defense Ammunition 40 S&W 155 Grain Jacketed Hollow Point
In stock
Winchester USA Ammunition 40 S&W 165 Grain Full Metal Jacket Flat Nose
In stock
Winchester USA Ammunition 40 S&W 180 Grain Full Metal Jacket
In stock
Winchester USA Ready Ammunition 40 S&W 165 Grain Full Metal Jacket Flat Nose
In stock
Winchester USA Ready Ammunition 40 S&W 165 Grain Full Metal Jacket Flat Nose
In stock
Winchester USA Ready Defense Ammunition 40 S&W 170 Grain Hex-Vent Jacketed Hollow Point
In stock
40 S&W — Premium Pistol Ammo | Ships to U.S. & Canada
The .40 S&W blends terminal performance with adequate magazine capacity and remains popular for duty and personal defense. Primereloaders carries premium .40 S&W reloading components — brass, JHP defensive bullets, match projectiles, and large pistol primers — for reloaders and agencies across the USA & Canada. Choose mid‑range pistol powders and appropriate primers for consistent ignition and controlled velocities; we list proven powder/primer pairings and published load data for each product. Whether you’re building duty rounds, competition loads, or economical practice ammo, our inventory includes trusted brands and bulk packs with fast North American shipping. Benefit from compatibility notes, recommended seating depths, and safe working procedures included with purchases. Shop .40 S&W at Primereloaders for consistent performance, top brand components, and reliable shipping to both the United States and Canada.