Re: Minimum seating depth?
Are you talking about Maximun seating depth? Meaning how deep can a bullet be seated in the casing as opposed to Minimum seating depth which refers to how little contact can a bullet have with the neck of the casing?
From most reloading manuals, the Maximum seating depth (corresponds to the shortest COAL, BTW) is about 2.800". The Minimum seating depth (corresponds to longest COAL), is whatever the chamber length is, or in the case of DBM, the mag length.