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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
E. A. Brown Accuracy Barrel
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<blockquote data-quote="shortgrass" data-source="post: 1612009" data-attributes="member: 24284"><p>A new barrel deserves new brass. Simple as that. Not all reamers are<strong><em> exactly</em></strong> alike. Reamer makers have tolerances they abide by and work within, just as those who chamber have tolerances they work within. Expecting brass that was fired in a factory cut chamber to easily fit in a supposedly "custom" chamber is a no-go 95%-98% of the time. Factory cut chambers are notoriously large in size to begin with. A 'custom' chamber will almost always be smaller in diameters and cut closer to the "GO" gauge than 'factory' will be. I will add that those 'tolerances' are measured at 4 places to the right of the decimal point and not reliably measured with a caliper, digital or not. If I need to measure something precisely, out come the micrometers. They're hanging right there so they're handy. The brass from the chamber in question could definitely be smoother, though. Bidngreen has it right, less than a minute in the lathe with some oil and 320g wet-n-dry on a good backer (think 1/4" wooden dowel, split lengthwise on 1 end for 1/2") would cure that roughness without significantly changing critical dimensions. A "Flex Hone" of proper size might work, too. What ever you do to 'polish' out the marks in the chamber, just be careful you don't do more harm than good.</p></blockquote><p></p>
[QUOTE="shortgrass, post: 1612009, member: 24284"] A new barrel deserves new brass. Simple as that. Not all reamers are[B][I] exactly[/I][/B] alike. Reamer makers have tolerances they abide by and work within, just as those who chamber have tolerances they work within. Expecting brass that was fired in a factory cut chamber to easily fit in a supposedly "custom" chamber is a no-go 95%-98% of the time. Factory cut chambers are notoriously large in size to begin with. A 'custom' chamber will almost always be smaller in diameters and cut closer to the "GO" gauge than 'factory' will be. I will add that those 'tolerances' are measured at 4 places to the right of the decimal point and not reliably measured with a caliper, digital or not. If I need to measure something precisely, out come the micrometers. They're hanging right there so they're handy. The brass from the chamber in question could definitely be smoother, though. Bidngreen has it right, less than a minute in the lathe with some oil and 320g wet-n-dry on a good backer (think 1/4" wooden dowel, split lengthwise on 1 end for 1/2") would cure that roughness without significantly changing critical dimensions. A "Flex Hone" of proper size might work, too. What ever you do to 'polish' out the marks in the chamber, just be careful you don't do more harm than good. [/QUOTE]
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E. A. Brown Accuracy Barrel
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