yep long range i agree! i was just trying to see if there was a way to set up the diagram to know what your COAL would be, like if you wanted to order a barrel before you had components to set up a dummy round.

example if you could measure your ogive to tip of your bullet, and have a known measurement on the reamer diagram where they would touch the lands you could set up your chamber to touch lands at mag length and have room to play without needing dummy round, but i guess that's impossible!