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Go to our website www.cartridgeanneal.com, scroll to the bottom of the home page. This shows our Headspace Gauge in use.  First measure the gage using your caliper or our Ultimate Cartridge Check System, now set your caliper or dial indicator to read 0.  Next insert a .case to be measured measure again and read the actual thickness of your rim.  Or If you have a case, you consider as your optimum standard set your caliper or dial indicator to 0. Hereafter every case measured will read + or – from this 0 setting.  

If you want to find out what your rifles headspace is take a small piece of pure lead, a little thicker than case rim, Insert it into the chamber in the rim area and close the action on it. You may have to close the action several times to compress the lead into the rim areas. You can now use this as your optimum rim thickness.  Some competition match shooters like all case headspace to be the same, cases too far from standard can be used for practice of fowler shots.  

See product demonstration video at www.cartridgeanneal.com or call (479) 629-5566 for information.

Tom Wilson ©