User:Cawpin/.338 Spectre

.338 Spectre
55gr 5.56 NATO vs 500gr .458 SOCOM
Type	Rifle
Place of origin	United States
Production history
Designer	Teppo Jutsu LLC
Specifications
Parent case	10mm 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 length	1.258 in (32.0 mm)
Overall length	2.260 in (57.4 mm)
Rifling twist	1 in 6.5"
Primer type	Large Pistol
Maximum pressure	37,500psi
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 to be an intermediate cartridge falling between traditional handgun and rifle cartridges.

External links

• Teppo Jutsu .338 Spectre page