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|Place of origin||United States|
|Used by||ranchers, trappers, small game hunters, varmint hunters, mule hunters|
|Parent case||.32-20 Winchester|
|Bullet diameter||.258 in (Script error mm)|
|Neck diameter||.274 in (Script error mm)|
|Shoulder diameter||.333 in (Script error mm)|
|Base diameter||.349 in (Script error mm)|
|Rim diameter||.408 in (Script error mm)|
|Rim thickness||.065 in (Script error mm)|
|Case length||1.330 in (Script error mm)|
|Overall length||1.592 in (Script error mm)|
|Primer type||small rifle|
|60 gr (Script error g) FP||2,101 ft/s (Script error m/s)||588 ft·lbf (Script error J)|
|75 gr (Script error g) FP||1,877 ft/s (Script error m/s)||587 ft·lbf (Script error J)|
|86 gr (Script error g) SP||1,673 ft/s (Script error m/s)||535 ft·lbf (Script error J)|
The .25-20 Winchester, or WCF (Winchester center fire) was developed about 1895 for the Winchester Model 1892 lever action rifle. It was based on necking down the .32-20 Winchester. In the early 20th century, it was a popular big game and varmint round, developing around 1460 ft/s with 86 grain bullets.
While the SAAMI pressure rating is a full 28,000 CUP, modern ammunition is often loaded lighter in deference to the weaker steels used on many of the original guns. The early black powder cartridges were loaded to about 20,000 psi, but the SAAMI rating is close to that of the high velocity smokeless rounds produced later. The high velocity loadings developed 1732 ft/s.
It was easy and economical to reload, and was once a favorite with farmers, ranchers, pot hunters and trappers. Though the .25-20 has been used on deer and even claimed a whitetail deer of long standing record in 1914, its use on large-bodied game is not advised due to its sedate ballistics and light bullet construction, which makes humane one-shot kills unlikely.
- Cartridge dimensions from ANSI/SAAMI Z299.4-1992 p. 45
- Script error
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