Man of Myth and Legend
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Fenix Ammunition: A Ballistic Comparison of 5.56x45mm vs. .300 AAC Blackout
Posted by Patriotman | Feb 19, 2021 | AP Staff, Tactical | 0 |
This article comes from Fenix Ammunition and is reprinted with permission gained via Twitter DM on 2/17/21. Fenix Ammunition has recently made the news because it forces anyone wishing to do business with them to check a box certifying that they did NOT vote for Joe Biden. It is largely symbolic but I also think it does make the person who did vote for them think harder about their choice. They have a great Twitter and they are outspoken Patriots. Check out their products here and, if you order anything, let them know we sent you!
The .300 AAC Blackout (aka .300 BLK, 300 Blackout, and 7.62 x 35mm) cartridge was developed by Advanced Armament Corporation and submitted for standardization to the Sporting Arms and Ammunition Manufacturer's Institute (SAAMI) and approved in 2011. The .300 BLK was developed in response to requests from the military for a standardized cartridge with more energy on target and "punching" power than the standard 5.56x45mm NATO cartridge at close and medium ranges, while maintaining the standard 30 round magazine of the government issued M4/AR-15 rifles.
Advanced Armament was able to achieve this by shortening a .223 Remington/5.56mm brass case and then "necking" up the brass case to utilize a larger, heavier .308"/7.62mm diameter projectile. Since the .300 Blackout shares the same case head dimensions as the .223 Remington / 5.56mm NATO cartridge, it allows use of the same bolt carrier group and magazines as a standard M4/AR-15, making conversion as simple as swapping the barrel and muzzle device. This has made the round extremely popular with the civilian AR-15 market for target shooting, hunting, and defensive use.
Despite reams of data, there is much debate regarding the ballistic advantages and disadvantages of 5.56x45mm as compared to .300 AAC Blackout. In this article, we will discuss several distinct advantages to .300 Blackout primarily in Close Quarters Combat (CQB) and defensive situations.
Projectile Frontal Area
A major advantage of .300 Blackout is the increased "Frontal Area" provided by the larger diameter .308" caliber projectile. Frontal Area is the total area of the circumference of the cylinder represented by the projectile facing the target.