.375 Winchester

US rifle cartridge

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.375 Winchester

Foreground: .375 Winchester. Left to right: 8mm Mauser, .308 Winchester, .375 Winchester, .22 Long Rifle.

Type

Rifle

Place of origin

United States

Production history

Designed

1978

Manufacturer

Winchester

Produced

1978–present

Specifications

Parent case

.38-55 Winchester

Case type

Rimmed, straight

Bullet diameter

.375 in (9.5 mm)

Land diameter

.366 in (9.3 mm)^[1]

Neck diameter

.400 in (10.2 mm)

Base diameter

.420 in (10.7 mm)

Rim diameter

.506 in (12.9 mm)

Rim thickness

.063 in (1.6 mm)

Case length

2.020 in (51.3 mm)

Overall length

2.560 in (65.0 mm)

Maximum pressure (CIP)

55,000 psi (380 MPa)

Maximum CUP

52,000^[2] CUP

Ballistic performance

Bullet mass/type	Velocity	Energy
200 gr (13 g) JFP	2,223 ft/s (678 m/s)	2,194.12 ft⋅lbf (2,974.83 J)
200 gr (13 g) JFP	2,419 ft/s (737 m/s)	2,598.09 ft⋅lbf (3,522.54 J)
220 gr (14 g) JFP	2,029 ft/s (618 m/s)	2,010.66 ft⋅lbf (2,726.09 J)
220 gr (14 g) JFP	2,236 ft/s (682 m/s)	2,441.85 ft⋅lbf (3,310.70 J)

Source(s): Hodgdon Online Reloading Data

The .375 Winchester / 9.5x51mmR is a modernized version of the .38-55 Winchester, a black powder cartridge from 1884. It was introduced in 1978 along with the Winchester Model 94 “Big Bore” lever action rifle, which was in production from 1978 until 1986.^[3]

Though very similar in appearance to the .38-55 Winchester parent cartridge, the .375 Winchester cartridge has a shorter case length and operates at a higher chamber pressure of 52,000 CUP or 55,000 psi (380 MPa), compared to the .38-55 Winchester cartridge which has a longer case length and operates at a lower chamber pressure of 30,000 CUP or 35,000 psi (240 MPa).

The most commonly used bullet weights for the .375 Winchester are between 180 gr to 260 gr (11.7 g to 16.9 g) and has been used on a variety of medium to large game species such as whitetail, pronghorn, caribou, elk, moose, black bear, and brown bear.^[4]

References

^ "C.I.P. TDCC datasheet 375 Win" (PDF). CIP. Archived from the original (PDF) on 2017-12-05.
^ Hoover, J. “Tank.” (2022, January 24). The .375 winchester. GUNS Magazine. https://gunsmagazine.com/our-experts/the-375-winchester/
^ "An Official Journal Of The NRA | Remembering The .375 Winchester Cartridge". An Official Journal Of The NRA. Retrieved 2023-12-19.
^ ".375 Caliber Cartridges". www.chuckhawks.com. Retrieved 2023-12-19.

Hodgdon Online Reloading Data

External links

Winchester Medium Bore Lever Action Rifles
375 Winchester

Cartridges derived from the .38-55 Winchester or its derivatives (including wildcats)

First generation derivatives

.30-30 Winchester
.32 Winchester Special
.375 Winchester

Second generation derivatives
(based on .30-30)

.219 Zipper
.25-35 Winchester
7-30 Waters
.30-30 Ackley Improved
.30 Herrett
.357 Herrett
.360 Buckhammer

Third generation derivatives

Based on .219 Zipper	.219 Donaldson Wasp .219 Zipper Improved .225 Winchester
Based on .25-35 Winchester	.22 Savage Hi-Power
Based on .30-30 Ackley Improved	.22/.30-30 Ackley Improved 6 mm/.30-30 Improved

Fourth generation derivatives
(based on .219 Donaldson Wasp)

6.5 mm Bench Rest Magnum

Winchester firearms and cartridges

Rifles

Lever-action	Henry rifle Model 1866 Model 1873 Model 1876 Model 1886 Model 1892 Model 1894 Model 1895 Model 53 Model 55 Model 64 Model 65 Model 71 Model 88 Model 150 Model 250 Model 255 Model 9422
Bolt-action	Model 1878 Hotchkiss Model 1895 Lee Navy Model 1900 Model 1902 Model 1904 Model 43 Model 47 Model 51 Imperial Model 52 Model 54 Model 56 Model 57 Model 58 Model 59 Model 60 Model 60A Model 67 Model 68 Model 69 Model 70 Model 72 Model 75 Model 121 Model 131 Model 141 Model 320 Model 325 Model 670 Model 770
Pump-action	Model 1890 Model 1906 Model 61 Model 62 Model 62A Model 270
Semi-automatic	Model 1903 Model 1905 Model 1907 Model 1910 Model 30 Model 63 Model 74 Model 77 Model 100 Model 190 Model 290 Model 490
Full-automatic	Olin/Winchester FAL Model 1917 WAR
Falling-block action	Model 1885

Shotguns

Pump-action	Model 1893 Model 1897 Model 1912 Model 25 Model 42 Model 1200 Model 1300
Lever-action	Model 1887 Model 1901 Model 9410
Single-shot	Model 20 Model 36 Model 37 Model 37A Model 41
Double-barrel	Model 21 Model 24 Model 96 Model 101
Semi-automatic	Model 1911 SL Model 40 Model 50 Model 59 Model 1400 Model 1500 SX-1