How deep does a .357 Magnum penetrate Tempered Glass?

At the muzzle, a representative .357 Magnum load penetrates approximately 14 mm (0.5 inches) into tempered glass.

What is the impact energy of a .357 Magnum?

This .357 Magnum load carries about 796 joules (587 ft-lb) at the muzzle.

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Will a .357 Magnum Penetrate Tempered Glass?

Yes — defeats a 6 mm tempered glass barrier

Penetration depth

14 mm (0.5″)

Impact velocity

395 m/s (1296 fps)

Muzzle energy

796 J (587 ft-lb)

Bullet behaviour

Expanded

Fired at the muzzle, a representative .357 Magnum load (10.2 g, SP, 395 m/s) reaches roughly 14 mm (0.5 inches) into tempered glass. That is enough to defeat a typical barrier of this material — treat anything behind it as exposed.

About Tempered Glass

Tempered and automotive glass runs about 6 mm thick.

.357 Magnum against other materials

Material	Depth (mm)	Depth (in)
Red Brick	99 mm	3.9″
Concrete	54 mm	2.1″
Steel A36	2 mm	0.1″
Steel AR500	1 mm	0.0″
Aluminum 6061	10 mm	0.4″

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Will a .357 Magnum Penetrate Tempered Glass?

About Tempered Glass

.357 Magnum against other materials

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