Quote:
Originally Posted by elkhunter11
The method or tooling that you use to find the distance to the lands really doesn't matter, and in fact the actual distance to the lands doesn't matter, as long as the result is that you are able to get your seating die adjusted to provide optimum accuracy with your load in your rifle.
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True ... it is relative and the proof is always on the paper. However, knowing the exact measurement on a new barrel also makes it easy to gauge throat erosion with subsequent measurements.