.380 Auto vs .40 S&W
The .380 Auto vs .40 S&W comparison illustrates the tradeoff between concealability and terminal performance. The .40 S&W (165gr JHP at 1175 fps) delivers 413 ft-lbs at 50 yards compared to the .380 Auto's (90gr JHP at 1000 fps) 166 ft-lbs. Penetration shows a stark difference: the .40 S&W reaches 14.9-15.3 inches, meeting FBI standards, while the .380 Auto manages only 8.8-9.0 inches. The .380 Auto's advantage is recoil at just 1.41 ft-lbs versus the .40 S&W's 5.94 ft-lbs. Pocket pistols chambered in .380 offer deep concealment where a full-size .40 S&W would print.
Ammunition Parameters
.380 Auto Parameters (Self-Defense Load)
.40 S&W Parameters (Self-Defense Load)
.380 Auto vs .40 S&W Ballistics Chart
Comparing bullet drop at various ranges between .380 Auto and .40 S&W.
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.380 Auto vs .40 S&W Energy Comparison
Comparing the muzzle energy and energy retention at various distances between .380 Auto and .40 S&W.
.380 Auto vs .40 S&W Bullet Penetration
Comparison of estimated penetration depth in 10% ballistic gel between .380 Auto and .40 S&W at self-defense distances.
Self-Defense Ammunition Penetration
Notes:
- FBI standard for optimal penetration is 12-18 inches in 10% ballistics gel
- Our penetration data is calculated using mathematical models based on sectional density, velocity, and expansion factors. While not actual gel tests, our calculations have been validated against manufacturer test data and provide reliable estimates for comparison purposes.
- Actual results may vary depending on clothing barriers and other factors
.380 Auto vs .40 S&W Recoil
Comparing recoil energy and impulse between .380 Auto and .40 S&W.
.380 Auto Recoil (Self-Defense Load)
.40 S&W Recoil (Self-Defense Load)
Notes:
- Recoil calculations based on bullet weight, velocity, powder charge, and firearm weight
- Recoil energy indicates the felt force when firing the weapon
- Recoil impulse represents momentum transfer during firing
- Actual felt recoil can vary based on grip, stance, and firearm design
.380 Auto vs .40 S&W Velocity
Velocity decay from muzzle to 50 yards for .380 Auto and .40 S&W.
.380 Auto vs .40 S&W Average Cost
Comparing cost per round and training affordability between .380 Auto and .40 S&W.