Select the bullet and the refinement area
To modify the mesh sizing, do ONE of the following:
Move the Size Adjustment slider to 0.2.
Click Use uniform.
Click Apply changes.
Click Spread Changes.
To concentrate additional elements around the perimeter of the bullet, we increase the number of Wall Layers:
From the Automatic Sizing context panel, click Wall Layers.
On the Wall Layers dialog, drag the Number of layers slider to 10, and click OK.
For more about mesh refinement