Will a .380 ACP Penetrate Aluminum 6061?

No — stops inside aluminum 6061 (reaches 5 mm of a 6 mm barrier)
Penetration depth
5 mm (0.2″)
Impact velocity
290 m/s (951 fps)
Muzzle energy
261 J (192 ft-lb)
Bullet behaviour
Intact

Fired at the muzzle, a representative .380 ACP load (6.2 g, FMJ, 290 m/s) reaches roughly 5 mm (0.2 inches) into aluminum 6061. It loses its energy before defeating a typical barrier of this material.

About Aluminum 6061

Aluminum plate (~6 mm), as found in light vehicle and aircraft skins.

.380 ACP against other materials

MaterialDepth (mm)Depth (in)
Red Brick38 mm1.5″
Concrete20 mm0.8″
Tempered Glass8 mm0.3″
Steel A361 mm0.0″
Steel AR5001 mm0.0″
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