The 300 BLK has a larger throat and therfore 300 BLK factory loading could cause excess pressure in 300 Whisper (R) / 300 Fireball chambers. 300 BLK cartridges and 300-221 Rem Fireball cartridges should be thought of in the same way. 5.56x45mm NATO Brass can be used as the parent brass and then resized / trimmed. The more people that ask for it the more likely they will produce it: (AAC has stated on other forums that they would provide the cartridge drawings to them if asked.) It would be awesome to see Redding pickup this cartridge as well. Set of Full Length Sizing Die and Ultra Micrometer Seating Die, 300 BLK, Part #U04453.Set of Full Length Sizing Die and Standard Seating Die, 300 BLK, Part #004453.Ultra Micrometer Seating Die only, 300 BLK, Part #U00099.Standard Seating Die only, 300 BLK, Part #006205.Full Length Sizing Die only, 300 BLK, Part # 005545.Reloading Dies are available from Forster Remington AccuTip 125 grain, OAL: 2.085.Nosler Ballistic Tip 125 grain, OAL: 2.085.Here are some suggested OAL for popular bullets: With 300 BLK ammo, the contact is on the bullet.īecause the bullet is a larger diameter, the rib will push the cartridges out of alignment,Īnd can lead to binding potentially resulting in Failures to Feed.įor this reason, it is important to load ammunition so that the contact point with the magazine rib is on the bullet ogive in an area of about 0.250 inch diameter. Sierra 220 MK loaded to 2.089 OAL (this length is optimal for reliable feeding from USGI magazines)Įxisting AR magazines have a rib which normally contacts the 5.56mm case-neck. ![]() Look for a load which results in a cyclic rate of 700 rpm or more.ĪA1680 is recommended because its bulk density matches the case capacity and it will generate enough gas pressure to cycle the weapon. These loads pay no attention to automatic rifle function and should not be used. ![]() Or for ARs by people not aware of the magazine limitations. Many existing loads were developed for Thompson Center® single-shot pistols, Recommended powder for most supersonic loads is Hodgdon H110.įor subsonic, there are special requirements and nearly all published loads are non-optimal for the 300 BLK upper. If you load your own ammo, pay special attention to all of the normal safety practices. Listed Below is the suggested loading info released by AAC. Since the 300 AAC BLACKOUT is an official SAAMI spec cartridge now, hopefully more innovation in this platform will come about. This looks like it will be a nice solution in many areas. Frankly any emphasis on boutique subsonic bullets is a lost cause in my book.I have been intrigued by the new incarnation of the SSK "300 Whisper®" concept introduced this month by AAC. Short range lethality in a compact package with ergonomic controls. It makes the best sense in something along the size of an MP5, such as the Sig Rattler. Marketing has been focused on subsonic range toy bull shit guns as big as the same made more effective with 5.56. It's slow, the bullet selection is small, and it takes up the space of a 5.56 gun. TAC-TX are at least 70 cents typically.ģ00 Blackout is a very niche cartridge that the gun media has masqueraded as some do-it-all wonder pony. Plus they're usually between 20 to 30 cents apiece in today's market. The Nosler Varmageddon and Hornady VMAX 110 gr projectiles will achieve the same velocity as the 110 TAC-TX, and offer excellent expansion and acceptable penetration. Quality 300 Blackout projectiles are indeed quite limited, but you don't need to buy the 110 or 120 TAC-TX exclusively. ![]() Both hit, but only one is going to act like a rifle round. This is one of the main differences in a hunting cartridge versus a target cartridge at distance. High velocity (2200+ FPS) bullets will turn organs like the liver and heart into a jelly during field dressing. Albeit it doesn't do a lot, and with the already slow speed of 300 Blackout the engagement range must be short since most light. Meanwhile lower weight 110-120 gr bullets moving fast enough will exceed some tissue elasticity with their hydrostatic shock during expansion/fragmentation, and yield not only a permanent crush cavity but the disruption of nearby tissue through liquification. Click to expand.The subsonic projectiles are all at the best a slow expanding bullet that has to entirely rely upon permanent cavity and penetration depth for wounding.
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