![]() Because of similar chamber dimensions between the two calibers, SAAMI has listed the combination of using a 300 blackout ammo round in a. 223/5.56 caliber) can also be a safety issue if ammunition of the two calibers is mixed. The very advantage of the subsonic 300 blackout ammo (its similarity to the popular. ![]() Weapons chambered for the round can be as light, compact, and quiet when suppressed as submachine guns like the 9×19mm MP5, 5.7x28mm FN P90, and 4.6×30mm MP7 while having more energy and accuracy at longer range.ĪR-15 rifle with dustcover and magazine band that identify it as having a chambering of. 300 BLK rounds are effective out of barrels as short as 4.5 in (110 mm). It also penetrates deeper and initially yaws faster. 30 caliber cartridge has an 89.1 percent increase in frontal bullet area over the 5.56×45mm, and so leaves a larger wound cavity in soft targets. It is able to replace the H&K MP5 for close quarters, and with just a magazine change, bring the fight to longer distances, outperforming the M4 carbine.The. 300 Blackout Ammo allows a user to have one firearm with the capability of switching between subsonic, supersonic VMAX or barrier penetrating ammunition all with just the change of a magazine. 300 BLACKOUT AMMO rounds like the Barnes TAC 110 grain, have “barrier blind” performance, being capable of penetration through several inches of different hard targets. 300 BLK rounds with varying loads have better ballistic coefficients and more energy out of similar length barrels. From a 9 in (230 mm) barrel, the 125 gr BLK round has the same muzzle energy as the M855 from the M4, and 5 percent more energy at 440 meters. In terms of hit probability, the Blackout has an effective range of 460 meters. However, it has the same amount of energy at 700 meters that the M855 has at 500 meters. 300 BLACKOUT AMMO round has a lower velocity and similar bullet drop and drift at shorter distances. The bullet has significant drop, drift, and energy loss at that distance.įrom a 16 in (410 mm) barrel, a 125 gr (8.1 g). From the 14.5 in (370 mm) barrel of the M4 carbine, the M855 5.56×45mm round has an effective point target range of 500 meters. The 7.62 Soviet’s cartridge taper prevented reliable feeding in AR magazines and created wear on the bolt. The 300 Blackout Ammo was designed to achieve energies similar to the 7.62×39mm Soviet in an AR-15 while using standard AR magazines at their full capacity.
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