Erratic primer ignition can sometimes be improved by simply reworking the firing pin nose tip. Here’s how to improve ignition on Knight DISC Extreme muzzleloaders.

by Norman E. Johnson

Faulty primer ignition can originate from a number of causes. Chief among these are impeded firing pin thrust, which may come from sluggish spring pressure. This can stem from too short a spring or a spring that is weak. There also may be a hysteresis factor where spring bind or cocking piece friction is present. Where correction of these factors is obviated, it may be time to take a close look at the firing pin tip for both shape or depth.

A customer presented me with a .52 caliber Knight DISC Extreme muzzleloader that had erratic ignition, particularly in cold weather.

Read more in the November 2016 issue.

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