Meplat Trimming
Trimming bullet tips to a uniform meplat diameter so a batch flies with a more consistent ballistic coefficient, often paired with pointing.
Meplat trimming uses a tool that holds the bullet by its bearing surface and shaves the very tip back to a uniform meplat diameter. Open-tip match bullets leave the jacket folded over the nose, and that tip varies from bullet to bullet, which produces small differences in drag and in measured tip length across a box.
Squaring the meplats makes the noses more alike, which tightens the spread in ballistic coefficient and can reduce vertical dispersion at distance. Because trimming opens the tip back up, many shooters follow it with bullet pointing to close the meplat down again and recover some of the lost form.