This is our Premier PRS cartridge and functions and performs flawlessly. 20 rounds per box. The world renowned Sierra 107 Matchking bullet in a new cartridge for optimum efficiency and performance in 6mm GT. The 6mm GT or 6-GT is the second most widely used cartridge among the top 200 pro shooters in PRS as of 2025.
The 6mm GT is a 2019 collaboration between George Gardner (GA Precision) and Tom Jacobs (Vapor Trail Bullets). Designed with competition shooting in mind, they wished to create a 6mm cartridge that could use forgiving propellants and feed reliably from AICS magazines. They also wanted the round to extend barrel life yet still provide high muzzle velocities with tight rifling twists to stabilize long, high-BC 6mm bullets.
Accordingly, the 6mm GT has a 35-degree shoulder angle for easy feeding, an optimized case nearing 100 percent capacity for powder.
The 6mm GT works very well on deer, pronghorn and sheep as a hunting round. The 6mm GT can also be chambered in AR-type semi-autos, though it’s used primarily in bolt guns.
General Comments
Known jokingly as the “Glorious Tiger,” the 6mm GT took off in the PRS and NRL match scene from 2019 onward. From the base to the shoulder junction, the 6 GT case is 0.100-inch longer than the 6mm Dasher, and it has a 35-degree shoulder versus the Dasher’s 40-degree design. Gardner and Jacobs also increased the neck length by 0.050 inch compared to the Dasher, making the brass 0.150-inch longer overall. Both dimensional changes help the 6 GT feed well from unmodified .308-size magazines, unlike the 6mm Dasher. Because it uses less propellant, the 6mm GT marginally increases barrel life compared to the 6mm Creedmoor.
Brass is available from Hornady, GAP, Alpha Munitions, Lapua, and now Peterson Cartridge. GA Precision, Iron Mike Armory, Clays Cartridge Co. and Hornady supply loaded ammunition.
DESCRIPTION
IMA Match 6mm GT 107 Grain Sierra Matchking 20 RoundsProduct Overview:
The 6mm GT uses the outstanding Sierra 107 Grain Matchking bullet. These cartridges have been formulated to yield consistent match performance.
Specifications:
Warning: You must be 18 or older to purchase rifle or shotgun ammunition and 21 or older to purchase handgun ammunition. All ammunition will be shipped UPS Ground and cannot be shipped to P.O. boxes. For safety reasons, we do not accept returns on ammunition. Always make sure you use the correct ammunition for your specific firearm. Check your local laws for any other regulations.
Attention: Due to current circumstances, we are not shipping to the states of CA, CT, IL, MA, NJ, NY or the District of Columbia. For residents in all other states, please check your local laws for restrictions before ordering any ammunition products.
