The Firing Line Forums - View Single Post - Headspace: Most Accurate Method : Determining Best OAL

Gary H · August 21, 2001, 08:14 PM

What is the most accurate method of determining headspace & OAL in a bolt action rifle? Folks have suggested the RCBS Micrometer and fired brass for headspace, but cases change size as they cool. Stoney Point has a direct way to determine OAL, but dummy case may not be exactly same as your favorite case. Various Bullet Comparators are available to measure loaded round.

If someone could simplify this issue and provide a practical approach to quantifying a bolt actions chamber and subsequent sizing operations.

August 21, 2001, 08:14 PM	#1
Gary H Senior Member Join Date: April 26, 2000 Location: Texas Posts: 2,267	Headspace: Most Accurate Method : Determining Best OAL What is the most accurate method of determining headspace & OAL in a bolt action rifle? Folks have suggested the RCBS Micrometer and fired brass for headspace, but cases change size as they cool. Stoney Point has a direct way to determine OAL, but dummy case may not be exactly same as your favorite case. Various Bullet Comparators are available to measure loaded round. If someone could simplify this issue and provide a practical approach to quantifying a bolt actions chamber and subsequent sizing operations.