ORIGINAL: gunnermhr
Do you mean OAL Over All Length? I always seat to the Ogive that way you can actually determine how much bullet "jump" You have into the lands of the barrel. Some bullets like to be seated into the lands some just touching and some.010" or 015 thousands off.
Hate to speak for him, but what I think he is asking, when he is setting up his seater die for bullet deapth, do you measure off the tip (from your notes of course), or use a comparitor and set up your seater die off that measurement.