.401 Winchester Self-Loading

1910 · Winchester Repeating Arms Company · 1 firearm in catalog

Also known as: .401 WSL, .401 SL, 401 Winchester

Cartridge specifications

Bullet Diameter10.31 mm (0.406")
Neck Diameter10.92 mm (0.430")
Base Diameter11.18 mm (0.440")
Case Length38.1 mm (1.500")
Overall Length50.8 mm (2.000")
Typical Bullet Weight12.96 g (200 gr)
Typical Muzzle Velocity652 m/s (2139 fps)
Typical Muzzle Energy2758 J (2034 ft·lbf)
Primer TypeLarge Rifle
Cartridge TypeRimless
Introduced1910

Firearms chambered in .401 Winchester Self-Loading