What is the primary use for the 12-gauge breaching cartridge?

The primary use of the 12-gauge breaching cartridge is to gain access through light doors and entryways. This type of cartridge is specifically designed for breaching, meaning it can effectively open or compromise the integrity of doors and barriers that are not heavily fortified. The projectiles in breaching cartridges are engineered to create a wide pattern upon firing, maximizing impact on the target area, which allows for quicker and more efficient entry in tactical situations.

In contrast, shooting targets at long range would require a different type of ammunition optimized for precision and distance, whereas breaching cartridges are not intended for that purpose. Training marksmen on accuracy also necessitates different ammunition that allows for proper marksmanship practice without the specialized breaching capabilities. Lastly, disabling security systems is beyond the intended function of the breaching cartridge, as their design focuses on physical barriers rather than electronic systems.