What miter and bevel angle do I need for coping 38/52 crown molding?
Cutting on the flat:

If you are cutting on the flat there are lots of mitre/bevel charts online like this one:


Cutting Nested:

Have you tried nesting your crown?

Hold the crown at the angle it would be on the wall, and just do a normal mitre (no need to worry about bevel).

This is how I prefer to cut it, but everyone has their preferences. You can buy different stops and clamps for setting this up to be quick and accurate (or make your own jig). As well as most saws nowadays have attachments for their saws for this.

Attachment:



V.S. Shop-made: