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|Place of origin||USA|
|Parent case||.38-55 Winchester|
|Bullet diameter||.375 in (9.5 mm)|
|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)|
|Source(s): Hodgdon Online Reloading Data|
The .375 Winchester is a modernized version of the .38-55 Winchester, a black powder cartridge from the 1880s. It was introduced in 1978 along with the Winchester Model 94 “Big Bore” lever action rifle.
Though very similar in appearance to the parent .38-55, the .375 has a shorter case length and operates at much higher pressures (50,000 CUP).
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