How do you measure bullet seating depth so that you achive the closest tollerance relative to getting the bullet enguaged with the lands and groves? Is this just a minimum depth seating achived by closing the bolt on an underseated bullet... then just double checking to see if the cartridge will fit and feed in and from the magazine or is their a tool you use to measure the depth?

It may not matter now but I want to experiment with this eventually.

Thanks in advance - BTRACK (||)