How deep does a 12ga Slug penetrate Tempered Glass?

At the muzzle, a representative 12ga Slug load penetrates approximately 8 mm (0.3 inches) into tempered glass.

What is the impact energy of a 12ga Slug?

This 12ga Slug load carries about 3538 joules (2609 ft-lb) at the muzzle.

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Will a 12ga Slug Penetrate Tempered Glass?

Yes — defeats a 6 mm tempered glass barrier

Penetration depth

8 mm (0.3″)

Impact velocity

500 m/s (1640 fps)

Muzzle energy

3538 J (2609 ft-lb)

Bullet behaviour

Intact

Fired at the muzzle, a representative 12ga Slug load (28.3 g, SLUG, 500 m/s) reaches roughly 8 mm (0.3 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.

12ga Slug against other materials

Material	Depth (mm)	Depth (in)
Red Brick	81 mm	3.2″
Concrete	19 mm	0.8″
Steel A36	4 mm	0.1″
Steel AR500	1 mm	0.0″
Aluminum 6061	7 mm	0.3″

Run your own numbers in the calculator →

12ga Slug vs Red Brick 12ga Slug vs Concrete 12ga Slug vs Steel A36 12ga Slug vs Steel AR500 12ga Slug vs Aluminum 6061 12ga Slug vs Pine Wood 12ga Slug vs Oak Wood 12ga Slug vs Kevlar NIJ III 9mm Luger vs Tempered Glass .45 ACP vs Tempered Glass .40 S&W vs Tempered Glass .380 ACP vs Tempered Glass .357 Magnum vs Tempered Glass .44 Magnum vs Tempered Glass 10mm Auto vs Tempered Glass .22 LR vs Tempered Glass

Will a 12ga Slug Penetrate Tempered Glass?

About Tempered Glass

12ga Slug against other materials

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