Charlie M. 1958 said something like:
Lew Hodgett wrote:
"Thomas G. Marshall" wrote:

I'm never quite sure what the best practices are for pre-drilling
holes for screws.

Use a dial caliper (About $20) and measure screw.

Use 75% of thread dia for pilot holes.

Use thread dia +.015 for clearance holes.

..015 %? You mean .00015 times (or 1/6666th of) the diameter larger?
Yikes!