Re: 6.5-284 bullet depth
First, get a Stony Point (now Hornady)comparater for that caliber to determine OAL. Prepare a dummy round, no primer or powder. Seat bullet close to desired OAL. Polish bullet with 0000 steel wool, insert in chamber and with jewelers eye piece, observe land marks, if any, on the bullet. This is known as "jam" point, and is where I begin seating. Depth can be adjusted up or down from there.