How Many 300 Blackout Rounds Fit in a Magazine

Cartridges such as the 300 Blackout rounds have been made in a way to achieve full capacity and achieve the same energies as Soviet cartridges in AR15 guns. In various rifles, there are different types of cartridges used. And each magazine fits a limited number of rounds.

To know how many 300 Blackout rounds fit in a magazine, we must first understand the measurement and other factors of this cartridge first. Right now, we’ll be discussing the features of these rounds so that we can know how many of them fit in a magazine.

The .300 AAC BLK

The .300 AAC BLK

The 300 Blackout rounds are also known as the .300 AAC (Advanced Armament Corporation) BLK. These are intermediate cartridges with a measurement of 7.62×32 mm. And these sorts of cartridges are used on the M4 carbine. They’re basically the same as the Kurz or Soviet cartridges used in an AR15.

Such rounds have a high capacity but can still be used in standard AR rifle magazines. If you fired a 300 Blackout round of 8.1 gram from a 16 inch barrel, it would have a low velocity compared to the firing of an M855 round, which has a target range of 500 meters.

But both rounds will have the same bullet drop and drift, and even the same loss of energy. But a Blackout round will reach a shorter distance, which would be around a target range of 460 meters.

This cartridge lets the user’s firearm switch between subsonic and supersonic VMAX when you change the magazine. It can replace the H&K MP5 and hit longer distances.

And the 300 BLK was created to hit targets at shorter ranges, so it also has better focus. They were made in a way that it’s easy to convert and fit in standard AR magazines. The standard bolt will also work for it. You only need to change the barrel and gas system.

How Many 300 BLK Can Fit in One Magazine

300 AAC Blackout

I’m sure you’ve seen gun boards and various blogs talk about the dreadful AR15 “kaboom!” event. This was an accident that occurred because of the wrong ammunition being chambered in the AR15. The result was shattered rifle receivers.

And the rifles were damaged because the magazine was overloaded with .300 Blackout in an AR15 chamber of .223/5.56. The .300 AAC BLK offers a .30 caliber round for those who want to perform with a .30 caliber projectile, with equipment like the M4 carbine.

So the Blackout would easily retrofit a .30 caliber barrel without needing other changes. When the .300 BLK uses a .223 case, which has been changed to work with a .30 caliber bullet, that means the magazine and bolt for a .223 or 5.56 rifle would work well with the .300 BLK.

For different sized magazines, the 300 BLK round count will be according to that measurement. For example, in GI magazines, you can fit about 15 rounds of .300 Blackout. And in a Magpul PMag, you can fit 30 rounds. It varies with different industry magazine types.

Final Words

No matter what magazine you decide to use, the 300 BLK can fit in with full capacity.
The 300 Blackout rounds will easily fit into ar triggers for hunting at the standard amount as long as you make the adjusting changes needed. But to avoid accidents still happening, it would be wise to shoot one caliber each range trip. It will be exhausting to keep reloading, but you’ll be on the safer side that way.

Nevertheless, you don’t need to worry too much about how much you need to load. Just avoid overloading and only load the number of rounds the magazine allows.