Repriming is a simple, but critical, step that reloaders often do not give enough attention to. In order to gain optimum primer sensitivity, it must be seated firmly to the bottom of the primer pocket. But this doesn't mean using so much force that the primer cup is deformed. When primers are properly seated, the top of the primer is from .005" to .008" below flush with the case head. The purpose of this is to assure that the primer anvil legs are in firm contact with the bottom of the primer pocket. If they are not so seated, it requires an average of 59% greater firing pin blow to give reliable ignition. This much extra force simply isn't available in many firearms.

Analysis of hundreds of handload misfires complaints show that the vast majority are caused by insufficient primer seating.

If, after completing the reloading operation, you discover some rounds with high primers, do not attempt to reseat the primer in a loaded round. To do so is extremely hazardous! The chance of a primer firing during proper seating is extremely remote. Yet, if it does, it will ignite the powder in the case and you have a home-made "grenade" right before you.

If high primers are discovered, remove both bullet and powder charge from the case before attempting to reseat the primer! There is no safe alternative.