Faxon Q&A #4: Chamber types, heat dissipation, headspace and more!
This YouTube video, "Faxon Q&A #4," features a discussion with Faxon about various aspects of firearm barrels. The experts delve into the differences between chamber types like .223, 5.56 NATO, and match/Wylde, explaining their relevance and practical implications. They also explore the meaning of tight versus loose chamber cuts, the requirements for achieving "subMOA" accuracy, and the distinction between true match and "subMOA" barrels. The conversation further covers the evolution of "match" standards, the processes of lapping and honing, and a detailed explanation of headspace, its measurement, adjustable headspace, and potential consequences of incorrect headspace. Additionally, the video addresses thermal dissipation in barrels, contrasting weight versus function and discussing barrel designs for sustained fire versus general use, citing historical examples like the BAR and Chauchat, and the M16's role. Finally, it touches on fitting extensions to receivers and the accuracy impact, and clarifies that AR-15 locking recesses are part of the barrel assembly.
