Primer Pocket Plugs from 21st Century Shooting
This video demonstrates the use of primer pocket plugs from 21st Century Shooting to accurately measure cartridge case capacity. By plugging the primer pocket, reloaders can fill cases with water after tumbling and cleaning, leading to more precise case capacity measurements. This data can then be used for sorting brass or inputting into ballistic software like QuickLOAD for improved load development accuracy.





