By loading the 300-grain Sierra HPBT MatchKing bullet at subsonic velocities (1,040 ft/sec.) for suppressed applications, the muzzle energy measures 720 ft-lbs., surpassing both the high velocity 115-grain load for the 9mm Parabellum as well as the 240-grain. 338 Spectre will launch the 180-grain BT at 1,800 ft./sec., approaching 1,300 ft-lbs. 35 Remington or even the 180-grain load for the. So, I'm impatient and decided to move forward with the build. Previously, I was trying to get commitments on the barrels, and one person has committed to date. 338 caliber 6.5 twist) by Palladin Machine(tp555) I will have 3-4 10.5' 'Shorty' 338 Spectre Barrels left over. Furthermore, it allows the user to employ existing suppressors for the 9mm without modification, providing enhanced tactical firepower.īallistic performance is comparable to the. After having my barrel blanks cut down (2 x 32'L McGowen SS. 338 caliber bullets, the cartridge offers a variety in projectile choice, ranging from 160-grain Barnes X Spitzers, through 180-grain BST to 300-grain HPBT MatchKing rifle bullets. 338 Spectre cartridge was developed specifically for the AR-15 family of gas-operated, detachable-box magazine-fed firearms. This leads us to introduce the new notion of frequent hypercyclicity. 338 Spectre offers great potential as a single shot, silhouette and small game cartridge. It shares rim size with the Remington 6.8 x 43mm SPC cartridge, allowing use of OEM bolts in this caliber. The cartridge is intended to fill the gap between traditional pistol caliber cartridges and existing rifle cartridges used in this weapon system. Marty ter Weeme of Teppo Jutsu (The cartridge has a wide array of applications Including small to medium game hunting, match target, and suppressed sniper shooting. We have continued the research and the development of the cartridge with extensive ballistic pressure testing and load. We have been providing factory 458 SOCOM ammunition since it was developed by Marty ter Weeme, aka: Teppo Jutsu back in 2001. 338 Spectre cartridge was developed specifically for the AR-15 family of gas-operated, detachable-box magazine-fed firearms. We are the leading manufacturer of 458 SOCOM, 375 SOCOM, 240 Spectre and 338 Spectre ammunition.
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