Features
Physical Data
5.450 in / 138.43 mm
Cartridge Length
1,782 grains / 115.47 grams
Cartridge Weight
661.5 grains / 42.86 grams FMJ (copper) boat tail with mild steel-core
Bullet
Minimum of 200 lb (91 kg)
Bullet Extraction
Manufacturer symbol (LC or WMA) and the year of manufacture
Headstamp
Brass (Copper Alloy No. 260)
Cartridge Case Material
50M, Boxer Style
Primer Type
Performance
U.S. Military: • MIL-DTL-10190 • MIL-STD-636 • MIL-STD-1916 • Drawing: 7553097 2,905 ft/s ± 30 ft/s (78 ft frommuzzle) @ 70 ± 2° F / 885 m/s ± 9 m/s (24 m frommuzzle) @ 21 ± 2° C
Manufacture Specifications
Muzzle Velocity
Average maximum: 65,000 psi @ 70° F (448 Mpa @ 21° C)
Chamber Pressure
Averagemean radii maximum: 3.75 in@200yds (9.53cm@183m) / 12 in@600yds (30.48cm@549m)
Accuracy
-65° F to 125° F (-54° C to 52° C)
Operating Range
For use in standard 12.7 x 99 mm chambers only
Note
More Info » winchestermilitary.com
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