CMMG Dissent in 338 ARC Is a Beast ! But Is It Hornady New Round Practical ?

Published on July 2, 2025
Duration: 13:25

This review covers the CMMG Dissent in 338 ARC, highlighting its performance with Hornady's new round. The firearm features a compact 6.5-inch barrel, a patent-pending operating system, and utilizes 400 Legend magazines with a 338 ARC follower. While the supersonic 338 ARC round exhibits significant recoil, the subsonic rounds are comparable to 300 Blackout. The review also touches on potential magazine compatibility issues and the firearm's adjustable gas system.

Quick Summary

The CMMG Dissent in 338 ARC offers a compact platform for Hornady's potent new round. While supersonic loads deliver significant recoil, especially from the 6.5-inch barrel, subsonic rounds are more manageable. Key features include a patent-pending operating system, ambi controls, and the use of modified 400 Legend magazines.

Frequently Asked Questions

What are the key features of the CMMG Dissent in 338 ARC?

The CMMG Dissent in 338 ARC features a compact 6.5-inch barrel, a patent-pending operating system, and utilizes 400 Legend magazines with a 338 ARC follower. It also includes ambi safety and mag release controls, a flat bow trigger, and a side charging handle.

How does the 338 ARC round perform in the CMMG Dissent?

The supersonic 338 ARC round exhibits significant recoil, comparable to a .308, especially from the short 6.5-inch barrel. Subsonic rounds are much milder, feeling similar to 300 Blackout subsonic loads.

What are the potential issues with the 338 ARC caliber and magazines?

A primary concern for the 338 ARC caliber has been magazine compatibility and feeding reliability. While this review used 400 Legend magazines with a modified follower without issues, other setups may experience feeding failures.

What is the twist rate of the CMMG Dissent 338 ARC barrel and why is it important?

The CMMG Dissent 338 ARC features a 1:8 twist rate. This rate is crucial for stabilizing the bullet, with longer barrels and faster twist rates generally providing better bullet spin for improved ballistic performance and accuracy.

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