300 AAC Blackout – 200 gr FMJ Subsonic – Magtech (300BLKSUBA) – 1000 Rounds

Suppressed 300 Blackout shooting is a lot more fun when the ammo is affordable enough to shoot in volume. This listing is Magtech 300 AAC Blackout 200 grain full metal jacket subsonic ammo from Magtech’s Tactical and Training line, MPN 300BLKSUBA, sold as a 1,000 round case. It suits suppressor owners, SBR builders, and anyone who wants quiet range days at a reasonable price.

Magtech rates this load at 1,017 fps with 459 ft-lbs of muzzle energy, keeping it subsonic so a suppressor can work without the crack of a supersonic bullet. At 200 grains it is a little lighter than the common 220 grain subsonic loads, which can help some rifles cycle. The full metal jacket bullet does not expand, so this is a training and plinking load, not for hunting or defense. Fifty round boxes make it easy to stage ammo for a full range session.

It fits firearms chambered in 300 AAC Blackout, also called 300 BLK, including AR-15 uppers, the SIG MCX and Rattler, B and T APC300, CMMG Banshee 300, Ruger American Ranch, and single shot rifles in 300 BLK. A common question is whether subsonic 300 BLK cycles without a suppressor. Some rifles do and many do not, since the added back pressure from a suppressor helps the action run. An adjustable gas block can help. Another common question is whether 300 Blackout fits a 223 magazine. Yes, it uses standard AR magazines, which is why labeling them clearly matters.

Magtech 300BLKSUBA is new production ammunition, not reloads. Magtech is part of the CBC group. Cases are reloadable brass with boxer primers, and the load is non-corrosive. This listing ships as 20 boxes of 50 rounds, 1,000 total, from one lot, so your suppressed rifle’s point of impact and cycling stay predictable from session to session.