Uploaded December 2025 | Updated September 2026, 1 week ago

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In this Brownells Quick Tip, Caleb explains a practical solution for feeding issues with the 338 ARC round in AR-15s. As of now, there are no dedicated 338 ARC magazines on the market, but the Duramag 400 Legend magazine turns out to be a perfect fit. If you're running into reliability problems, this might be the solution you've been looking for.

Chapters:
00:00 Introduction
00:09 What is 338 ARC?
00:29 338 ARC vs. 300 Blackout
00:43 Range Performance and Build Video Mention
01:06 Magazine Compatibility Issues
01:27 Why the Duramag 400 Legend Works
02:01 Feeding Issue Troubleshooting
02:16 Final Thoughts and Support