This video from Brownells Gun Techs Steve Ostrem and Caleb Savant explains the process of "breaking in" a new firearm barrel. They detail how microscopic burrs in newly machined rifling can be smoothed out by firing bullets, preventing copper fouling and improving accuracy. The video clarifies that this process is most beneficial for cut-rifled and button-rifled barrels, while cold hammer-forged, chrome-lined, or nitrided barrels (common on AR-15s) and pistol barrels generally do not require break-in. Smaller caliber rifles are also noted to benefit more than larger calibers.
This YouTube video features a Q&A session with Nathaniel from Faxon, delving into the intricacies of barrel manufacturing. The discussion highlights the differences and pros/cons of nitride versus chrome lining treatments for firearm barrels, touching on their impact on accuracy and durability. The video also explores the history and evolution of barrel manufacturing processes, including cold hammer forging and cut rifling, as well as advancements like button rifling and progressive twist rifling. The discussion extends to the metallurgy of stainless steel barrels and the potential benefits of nitride treatment for other firearm components.
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