In FBI testing protocol conducted by Barnes, the 300 Blackout 110 grain TAC-TX was fired in a 9” barrel with an average muzzle velocity of 2186 feet per second. For each category, three shots were fired. For firing at bare gel, the projectile penetrated 20.5 inches. The projectile expanded from .308 to .585 inches and retained 98% of its original weight. When fired at gel through heavy clothing, the projectile penetrated 21.1 inches. The projectile expanded from .308 to .594 inches and retained 98.7% of its original weight. When fired into steel (car door) the projectile penetrated 18 inches and retained 98% of its weight. The projectile expanded from .308 to .663 inches. When fired into wall board the projectile penetrated 19 inches. The projectile expanded from .308 to .586 inches and retained 93.4% of its original weight. When fired into plywood the projectile penetrated 18.6 inches into the gel. The projectile expanded from .308 to .595 inches and retained 86.9% of its original weight. When fired into glass (windshield) the projectile penetrated 16.6 inches into the gel and retained 77.5% of its original weight. The projectile expanded from .308 to .498 inches.
The 338 Lapua Magnum cartridge contains a 300grain OTM projectile. They are loaded in Lapua cartridge cases. Like the 5.56mm TAC-TX, there is a final 100% visual and/or vision system inspection of finished cartridges prior to final inspection. The average muzzle velocity of this load is 2,640 ± 35 feet per second measured at 15 feet. The maximum pressure is 63,500 psi and tested with a SAAMI compliant barrel. The load has average muzzle energy of 4,644 ft-lb and a ballistic coefficient of 0.768 (G1). When tested at the factory, the accuracy extreme spread of three 5-round groups is less than 0.8” at 100 yards when fired in a SAAMI-compliant 24 inch test barrel mounted in a Universal Receiver.