Wood plugs - ring when staining

[Kent A Bathurst]

I think the bit chattered as it went into the wood. That is, the diameter of the hole down in the hole is different from the diameter right at the surface. The dark ring is a little v-shaped groove.

Perhaps you can avoid the chattering by clamping a waste block on to the face of the door, and drilling through it into the door. The chattering will happen on the face of the waste block.

This ^^^^^^^^^

Did you use a DP , or hand-held drill?