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One of the many functions provided by the Ultimate Cartridge Check System is to precisely check primer seating depth. When seating a primer in a case it should be seated at least flush but preferably below flush, never protruding.

This is critical for semi-auto firearms and important for accuracy in all firearm actions for consistent ignition. No one wants to close the bolt and be greeted with a slam fire, BOOM! If you will examine a primer before seating, you’ll notice the anvil is not fully seated flush with the exterior cup.

When priming, it’s best to seat it firmly all the way to the bottom of the primer pocket in the case. By doing this you will seat the anvil and sensitizes the priming compound. Many precision reloaders uniform the primer pocket making all the exact same depth and removing the minuscule radius in the bottom corner. Many tools are available for this procedure.

If all cases have the pockets uniformed then all primers seated will be consistent, one of the steps in precision reloading.

Using the Ultimate Cartridge Check System affords a precision method for checking primer seating depth, this leaves no question as to having done the job precisely.

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

Tom Wilson ©