Daily Bulletin » Prussian Blue https://bulletin.accurateshooter.com from AccurateShooter.com Wed, 17 Jun 2026 15:33:14 +0000 en-US hourly 1 https://wordpress.org/?v=4.1.26 “Blueprinting” Action & Barrel Fitting — Explained by Jim Borden https://bulletin.accurateshooter.com/2025/11/blueprinting-action-barrel-fitting-explained-by-jim-borden/ https://bulletin.accurateshooter.com/2025/11/blueprinting-action-barrel-fitting-explained-by-jim-borden/#comments Fri, 14 Nov 2025 13:30:07 +0000 https://bulletin.accurateshooter.com/?p=72117 Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrel

Jim Borden, the very knowledgeable owner of Borden Accuracy, provided an interesting historical insight about barrel fitting and the term “blueprinting”. Jim has posted on his Borden Accuracy Facebook page an explanation of the term “blueprinting” as it originally was used with respect to barrel/shoulder/lug fitting.

Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrelBarrel/Shoulder Fit and Blue-Printing
Jim told us: “Something often overlooked on barrel installation is the shoulder fit. Many are so overly obsessed with doing a crank-on fit of threads that the shoulder contact is overlooked. Full, solid barrel shoulder to recoil lug or action face is critical to optimum accuracy and precision.

Many years ago part of the ‘blueprinting’ of an action was the use of Prussian blue to ‘blueprint’ lug fit, thread fit, and barrel shoulder fit. It was a colloquial expression that had nothing to do referring to a blueprint or drawing of the action.” Bet you didn’t know that!

About the photo below, Jim noted: “the fuzzy look on the threads is a liberal coating of Never-Seez thread lubricant.”

Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrel
Look carefully to see the Prussian Blue applied to the barrel shoulder, plus Never Seez on threads.

Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrel

]]> https://bulletin.accurateshooter.com/2025/11/blueprinting-action-barrel-fitting-explained-by-jim-borden/feed/ 0 The “Blueprinting” Process for Barrel Shoulder/Lug Fitting https://bulletin.accurateshooter.com/2024/12/the-blueprinting-process-for-barrel-shoulderlug-fitting/ https://bulletin.accurateshooter.com/2024/12/the-blueprinting-process-for-barrel-shoulderlug-fitting/#comments Sun, 15 Dec 2024 06:06:08 +0000 http://bulletin.accurateshooter.com/?p=70951 Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrel

Jim Borden, the very knowledgeable owner of Borden Accuracy, provided an interesting historical insight about barrel fitting and the term “blueprinting”. Jim has posted on his Borden Accuracy Facebook page an explanation of the term “blueprinting” as it originally was used with respect to barrel/shoulder/lug fitting.

Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrelBarrel/Shoulder Fit and Blue-Printing
Jim told us: “Something often overlooked on barrel installation is the shoulder fit. Many are so overly obsessed with doing a crank-on fit of threads that the shoulder contact is overlooked. Full, solid barrel shoulder to recoil lug or action face is critical to optimum accuracy and precision.

Many years ago part of the ‘blueprinting’ of an action was the use of Prussian blue to ‘blueprint’ lug fit, thread fit, and barrel shoulder fit. It was a colloquial expression that had nothing to do referring to a blueprint or drawing of the action.” Bet you didn’t know that!

About the photo below, Jim noted: “the fuzzy look on the threads is a liberal coating of Never-Seez thread lubricant.”

Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrel
Look carefully to see the Prussian Blue applied to the barrel shoulder, plus Never Seez on threads.

Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrel

]]> https://bulletin.accurateshooter.com/2024/12/the-blueprinting-process-for-barrel-shoulderlug-fitting/feed/ 0 Jim Borden Explains “Blueprinting” for Barrel Shoulders & Lugs https://bulletin.accurateshooter.com/2021/01/jim-borden-explains-blue-printing-for-barrel-shoulders-lugs/ https://bulletin.accurateshooter.com/2021/01/jim-borden-explains-blue-printing-for-barrel-shoulders-lugs/#comments Sat, 16 Jan 2021 12:56:19 +0000 http://bulletin.accurateshooter.com/?p=65339 Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrel

Jim Borden, the very knowledgeable owner of Borden Accuracy, provided an interesting historical insight about barrel fitting and the term “blueprinting”. Jim recently posted on the Borden Accuracy Facebook page an explanation of the term “blueprinting” as it originally was used with respect to barrel/shoulder/lug fitting.

Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrelBarrel/Shoulder Fit and Blue-Printing
Jim told us: “Something often overlooked on barrel installation is the shoulder fit. Many are so overly obsessed with doing a crank-on fit of threads that the shoulder contact is overlooked. Full, solid barrel shoulder to recoil lug or action face is critical to optimum accuracy and precision.

Many years ago part of the ‘blueprinting’ of an action was the use of Prussian blue to ‘blueprint’ lug fit, thread fit, and barrel shoulder fit. It was a colloquial expression that had nothing to do referring to a blueprint or drawing of the action.” Bet you didn’t know that!

About the photo below, Jim noted: “the fuzzy look on the threads is a liberal coating of Never-Seez thread lubricant.”

Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrel
Look carefully to see the Prussian Blue applied to the barrel shoulder, plus Never Seez on threads.

Jim borden accuracy blueprinting action receiver prussian blue shoulder lug barrel

]]> https://bulletin.accurateshooter.com/2021/01/jim-borden-explains-blue-printing-for-barrel-shoulders-lugs/feed/ 1