User:Cawpin/.338 Spectre

.338 Spectre
55gr 5.56 NATO vs 500gr .458 SOCOM
TypeRifle
Place of originUnited States
Production history
DesignerTeppo Jutsu LLC
Specifications
Parent case10mm Magnum
Bullet diameter.338 in (8.6 mm)
Neck diameter.361 in (9.2 mm)
Shoulder diameter.409 in (10.4 mm)
Base diameter.425 in (10.8 mm)
Rim diameter.425 in (10.8 mm)
Rim thickness.055 in (1.4 mm)
Case length1.258 in (32.0 mm)
Overall length2.260 in (57.4 mm)
Rifling twist1 in 6.5"
Primer typeLarge Pistol
Maximum pressure37,500psi
Ballistic performance
Bullet mass/type Velocity Energy
250 gr (16 g) SP 655 m/s (2,150 ft/s) 3,478 J (2,565 ft⋅lbf)
300 gr (19 g) HP 580 m/s (1,900 ft/s) 3,261 J (2,405 ft⋅lbf)
325 gr (21 g) FTX 566 m/s (1,860 ft/s) 3,384 J (2,496 ft⋅lbf)
405 gr (26 g) JFP 489 m/s (1,600 ft/s) 3,148 J (2,322 ft⋅lbf)
600 gr (39 g) RN 304.8 m/s (1,000 ft/s) 1,811 J (1,336 ft⋅lbf)

.338 Spectre is a wildcat cartridge developed by Teppo Jutsu [1] to be an intermediate cartridge falling between traditional handgun and rifle cartridges.


References

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