Headspacing Pre-Cut Long Chambers

A how-to on headspacing rimless cartridge chambers cut long.

by Norman E. Johnson

This treatise will cover headspacing a rimless cartridge chamber reamed longer than the 0.030 inches required for normal chambering of a “Go” headspace gauge or new cartridge case. Here the barrel shoulder must be moved forward to achieve proper headspace. This is essentially opposite of working with a short chamber where a reamer is used in attaining proper headspace leaving the shoulder unaltered.

Read more in our September 2014 issue. Back issues are available.

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