What is 277 wolverine?

The 277 Wolverine is a relatively new and proprietary cartridge developed by Mad Dog Weapon Systems. It is essentially a 6.8 SPC case necked down to accept a .277 caliber bullet. The goal of this cartridge was to provide increased accuracy, energy, and terminal performance compared to the 5.56 NATO while still fitting in a standard AR-15 platform.

The 277 Wolverine typically uses bullets ranging from 90 to 110 grains and can achieve velocities of around 2,600 to 2,900 feet per second, depending on the bullet weight and powder charge. It has been praised for its accuracy and ability to stay supersonic at longer ranges compared to the 5.56 NATO.

The 277 Wolverine has gained popularity among hunters and shooters looking for a cartridge that offers a balance of ballistics performance, recoil, and magazine compatibility in an AR-15 platform. However, due to its proprietary nature, ammunition and components for the 277 Wolverine can be less widely available and more expensive compared to other cartridges.