@SamBarnes0594 The sketch uses the incoming end face. Its length allowance is on the blank drawing, but our sheet doesn't identify individual samples. Annoyingly basic omission.

Start a labelled bench set with overall length and the intended seating reference. An exposed-length comparison can then help flag seating differences for review.

@SamBarnes0594 Exposed length still needs a caveat there. A shorter blank with a seating gap could give the same reading as a correctly seated longer one.

Fair correction: I meant paired measurements, not a standalone pass mark. The acceptance reference needs to distinguish permitted blank variation from a seating gap.

@SamBarnes0594 Does that mean the seating face has to be the finished-part datum?

@DanLoop Not necessarily. There needs to be a defined relationship between them. The drawing owner can explain which incoming surface supports the intended machining reference.

I've settled the next step: a labelled dimensional comparison and a review of the seating reference. That answers my planning question; acceptance of automatic loading still depends on what the review establishes.

You've got a defined next step, with the loading decision still tied to what the review actually establishes.