I believe you will find that journal clearances are typically diametral clearance, which the crushed lead will measure directly.
Is this new bearing from the original manufacturer ?
Is the size and condition of the journal serviceable, according to the manufacturer's specifications?
I'd also expect that a replacement bearing would be made to size, and accurately enough that the bluing check would only be a check. The 80% "contact" might not be correct in the circumferential direction for more sophisticated bearing profiles. Again the bearing manufacturer should say. Are you on speaking terms with them?