.351 Winchester Self-Loading

.351 Winchester Self-Loading
From left to right: .35 Winchester Self-Loading, .351 Winchester Self-Loading, .45 ACP
TypeRifle
Place of originUnited States
Service history
Used byFrance
United Kingdom
Russia
United States
WarsWorld War I
Production history
DesignerWinchester Repeating Arms Company
Designed1906
Specifications
Case typeSemi-rimmed, straight
Bullet diameter0.352 in (8.9 mm)
Neck diameter0.373 in (9.5 mm)
Shoulder diameter0.377 in (9.6 mm)
Base diameter0.380 in (9.7 mm)
Rim diameter0.407 in (10.3 mm)
Rim thickness0.05 in (1.3 mm)
Case length1.375 in (34.9 mm)
Overall length1.906 in (48.4 mm)
Rifling twist1 in 16
Primer typeSmall rifle
Maximum pressure39,000 psi (270 MPa)
Maximum CUP45,000[1] CUP
Ballistic performance
Bullet mass/type Velocity Energy
180 gr (12 g) 1,870 ft/s (570 m/s) 1,400 ft⋅lbf (1,900 J)
Test barrel length: 20 in.
Source(s): Whelen, Townsend. The American Rifle. Century Co. 1918. p. 266.

The .351 Winchester Self-Loading (.351 SL /.351 WSL) or 8.9x34mmSR is an American rifle cartridge designed in 1906.

  1. ^ Saami pressures. (n.d.). Retrieved May 5, 2023, from https://leverguns.com/articles/saami_pressures.htm