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Rifles, Reloading, Optics, Equipment
Reloading
Testing Cases After Resizing?
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<blockquote data-quote="entoptics" data-source="post: 2146266" data-attributes="member: 104268"><p>[URL unfurl="true"]https://www.hornady.com/reloading/precision-measuring/precision-tools-and-gauges/lock-n-load-bullet-comparator#!/[/URL]</p><p></p><p>I'd suggest getting this tool, and the appropriate inserts for the calibers you reload. If you get the 0.416 and/or 0.375 caliber insert, it can be used as a case gauge for most shouldered "big bores". Obviously, it's good for measuring base to ogive, and other bullet dimensions also.</p><p></p><p>To measure base to shoulder on a piece of brass, you attach the gauge to your calipers with the 0.375 or 0.416 insert, place the case in the gauge so it sits on the shoulder, and record the measurement from base to shoulder. Measure several once fired cases to get a baseline. Then, size a case and measure it. You are aiming for 0.002" less than your unsized measurement. Adjust your die down 1/16 of a turn at a time (screw it in further), until you get 0.001-0.003" less than your once fired cases before resizing.</p><p></p><p>If you're already screwing the die in to touch the shell holder, and the cases aren't being bumped short enough (can't be sure that's the problem till you measure), then you may have to sand your shell holder down a little to increase the amount you can screw it in for sizing. Some sandpaper on a flat surface, and some elbow grease can take off a few thousands of an inch easily enough.</p><p></p><p>Doing it this way will greatly improve your brass life, by preventing excessive work hardening from being squished too small during sizing, then blown back out during firing. It will also potentially improve accuracy, by providing a consistent chamber fit, while still sizing the case small enough to chamber easily.</p></blockquote><p></p>
[QUOTE="entoptics, post: 2146266, member: 104268"] [URL unfurl="true"]https://www.hornady.com/reloading/precision-measuring/precision-tools-and-gauges/lock-n-load-bullet-comparator#!/[/URL] I'd suggest getting this tool, and the appropriate inserts for the calibers you reload. If you get the 0.416 and/or 0.375 caliber insert, it can be used as a case gauge for most shouldered "big bores". Obviously, it's good for measuring base to ogive, and other bullet dimensions also. To measure base to shoulder on a piece of brass, you attach the gauge to your calipers with the 0.375 or 0.416 insert, place the case in the gauge so it sits on the shoulder, and record the measurement from base to shoulder. Measure several once fired cases to get a baseline. Then, size a case and measure it. You are aiming for 0.002" less than your unsized measurement. Adjust your die down 1/16 of a turn at a time (screw it in further), until you get 0.001-0.003" less than your once fired cases before resizing. If you're already screwing the die in to touch the shell holder, and the cases aren't being bumped short enough (can't be sure that's the problem till you measure), then you may have to sand your shell holder down a little to increase the amount you can screw it in for sizing. Some sandpaper on a flat surface, and some elbow grease can take off a few thousands of an inch easily enough. Doing it this way will greatly improve your brass life, by preventing excessive work hardening from being squished too small during sizing, then blown back out during firing. It will also potentially improve accuracy, by providing a consistent chamber fit, while still sizing the case small enough to chamber easily. [/QUOTE]
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Testing Cases After Resizing?
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