|Place of origin||USA|
|Parent case||.50 WCF|
|Bullet diameter||.348 in (8.8 mm)|
|Neck diameter||.3785 in (9.61 mm)|
|Shoulder diameter||.485 in (12.3 mm)|
|Base diameter||.553 in (14.0 mm)|
|Rim diameter||.610 in (15.5 mm)|
|Rim thickness||.070 in (1.8 mm)|
|Case length||2.255 in (57.3 mm)|
|Overall length||2.795 in (71.0 mm)|
|Rifling twist||1 in 16|
|Primer type||Large rifle|
|150 gr (10 g)||2,890 ft/s (880 m/s)||2,780 ft·lbf (3,770 J)|
|200 gr (13 g)||2,530 ft/s (770 m/s)||2,840 ft·lbf (3,850 J)|
|250 gr (16 g)||2,350 ft/s (720 m/s)||3,060 ft·lbf (4,150 J)|
|Test barrel length: 20|
The .348 Winchester is an American rifle cartridge. It was introduced in 1936, and developed for the Winchester Model 71 lever rifle. The .348 was one of the most powerful rimmed rounds ever used in a lever rifle.
It is excellent for any North American big game in woods or brush, if the 250 grain bullet is used, but not especially suited to long range, as a result of the need to use flat-nose slugs due to the Model 71's tubular magazine. (Factory-loaded, midrange trajectory at 200 yards (180 m) is 2.9 in (7.4 cm) for the 150-grain (9.7 g) bullet, 3.6 in (9.1 cm) for the 200-grain (13 g) round, and 4.4 in (11 cm) for the 250-grain (16 g) slug.) The 200-and-250-grain (13 and 16 g) loadings are preferred for anything past 100 yd (91 m).
In 1962, Winchester dropped the factory 150 gr and 250 gr loads, retaining only the 200 gr. No other rifle ever was ever offered in .348, and it has been supplanted by the .358 Winchester (in the Model 88). (The Model 71 was discontinued in 1958.)
In 1987 Browning produced a modern version of the Model 71 in Japan. These have different thread sizes in places, most notably the barrels, and many parts will not interchange with the originals. The Browning version was a limited production model only.
The case of the .348 is used to produce the 8-348w wildcat, used to rechamber World War 1-era rifles such as Lebel or Berthier, instead of the original 8x50mmR, still considered war material in France and therefore strictly regulated. The .348 is also the basis for the .348 Ackley Improved and .50 Alaskan.
See also 
- Barnes, Frank C., ed. by John T. Amber. Cartridges of the World. Northfield, IL: DBI Books, 1972. p52
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