What is meant by the term "fire lapping"?

The term "fire lapping" refers specifically to the process of coating projectiles in aluminum-oxide grit and firing them through the bore of a firearm. This technique is utilized to smooth out imperfections and enhance the internal surface of the barrel. The grit particles are embedded into the bore by the force of the firing, effectively polishing it over multiple shots. This can lead to improved accuracy and reduced fouling, as it allows for a more uniform surface that minimizes resistance between the bullet and barrel.

This method is different from simply cleaning the bore or applying lubricants, as it actively alters the barrel's interior surface through a controlled shooting process. It does not focus on aesthetics since the goal is to improve performance rather than the look of the firearm.