The Shocking Truths About .223 vs 5.56 You’ve Never Heard Before!
This video from Line 45, presented by Scott, clarifies the critical differences between .223 REM and 5.56 NATO ammunition and their corresponding rifle chambers. It emphasizes that while often mistaken as identical, these calibers have distinct pressure ratings and chamber designs, particularly concerning freebore length. Understanding these differences is crucial for rifle longevity, safety, and reliable performance, especially in survival (SHTF) scenarios.











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