How deep does a .45 ACP penetrate Drywall (Gypsum)?

At the muzzle, a representative .45 ACP load penetrates approximately 303 mm (11.9 inches) into drywall (gypsum).

What is the impact energy of a .45 ACP?

This .45 ACP load carries about 504 joules (371 ft-lb) at the muzzle.

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Will a .45 ACP Penetrate Drywall (Gypsum)?

Yes — defeats a 13 mm drywall (gypsum) barrier

Penetration depth

303 mm (11.9″)

Impact velocity

260 m/s (853 fps)

Muzzle energy

504 J (371 ft-lb)

Bullet behaviour

Intact

Fired at the muzzle, a representative .45 ACP load (14.9 g, FMJ, 260 m/s) reaches roughly 303 mm (11.9 inches) into drywall (gypsum). That is enough to defeat a typical barrier of this material — treat anything behind it as exposed.

About Drywall (Gypsum)

One sheet of interior drywall is ~13 mm; a wall is two sheets and a gap.

.45 ACP against other materials

Material	Depth (mm)	Depth (in)
Red Brick	46 mm	1.8″
Concrete	24 mm	1.0″
Tempered Glass	10 mm	0.4″
Steel A36	1 mm	0.0″
Steel AR500	1 mm	0.0″

Run your own numbers in the calculator →

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Will a .45 ACP Penetrate Drywall (Gypsum)?

About Drywall (Gypsum)

.45 ACP against other materials

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