Good article. When I build a custom rifle, I usually take the piece I cut off the muzzle end and run the chamber reamer into it until it just cuts the shoulder - then quit. The creates a guage that allows the handloader to calculate the overall length at which the bullet will engage the lands. But in the case of a factory rifle or a custom rifle where the reamer was not used to create a guage, the method described should work great. Thanks again. Roskoe.