Will a .44 Magnum Penetrate Tempered Glass?

Yes — defeats a 6 mm tempered glass barrier
Penetration depth
15 mm (0.6″)
Impact velocity
400 m/s (1312 fps)
Muzzle energy
1248 J (920 ft-lb)
Bullet behaviour
Expanded

Fired at the muzzle, a representative .44 Magnum load (15.6 g, SP, 400 m/s) reaches roughly 15 mm (0.6 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.

.44 Magnum against other materials

MaterialDepth (mm)Depth (in)
Red Brick107 mm4.2″
Concrete58 mm2.3″
Steel A362 mm0.1″
Steel AR5001 mm0.0″
Aluminum 606111 mm0.4″
Run your own numbers in the calculator →

Related

.44 Magnum vs Red Brick.44 Magnum vs Concrete.44 Magnum vs Steel A36.44 Magnum vs Steel AR500.44 Magnum vs Aluminum 6061.44 Magnum vs Pine Wood.44 Magnum vs Oak Wood.44 Magnum vs Kevlar NIJ III9mm Luger vs Tempered Glass.45 ACP vs Tempered Glass.40 S&W vs Tempered Glass.380 ACP vs Tempered Glass.357 Magnum vs Tempered Glass10mm Auto vs Tempered Glass.22 LR vs Tempered Glass5.56 NATO vs Tempered Glass