American Rifleman - August 2017 - 44
IV SE IT
US OR EF
CL D EN
EX EN R B
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QUESTIONS & ANSWERS
Make Room For Headspace
2.0487" (Min.) 2.0587" (Max.)
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I have owned and handled
guns for 70 years, and have
never been concerned about
headspace. I have three sporterized
Springfield 1903s. One had a nice shiny
bolt, while my favorite one had a very
dull bolt. So I switched those. Should I
take it out and reach around a tree to
fire it? Would the brass show any problems? If headspace is so critical, how
come I read about fire forming brass?
How do headspace gauges work?
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While it is never recommended that one cavalierly
trade bolts between rifles,
if the process is monitored and
precautions are observed, it may be
perfectly safe. It's probably unlikely
that your three U.S. 1903 rifles feature the bolts with which they were
originally fitted, and it's totally
possible that switching bolts could
actually improve the headspace
dimensions of the rifles involved.
A competent gunsmith with proper
gauges can check the result.
Keeping within the constraints of
this space, the quick and dirty definition of headspace within a firearm
is the distance from the bolt face,
when the bolt is locked, to a location, usually within the chamber, that
provides a "stopping point," beyond
We have received several comments
concerning the "Question & Answer" on
"Chamber Pressure Relevance"
(June 2017, p. 42). Because of space
constraints, the editors condensed and
re-arranged the original answer sent to
the letter writer, who asked for a comparison of chamber pressures between
the 16" guns of World War II battleships
5/10/16 11:38 AM