SINCLAIR INTERNATIONAL - Sinclair Chamber Length Gage
DescriptionThe Sinclair Chamber Length Gauges are designed so the handloader can determine the true length of his rifle's chamber when measuring from the bolt face to the end of the chamber's neck. This measurement will tell you how much excess case length your chamber may have over published trim lengths in reloading handbooks.
The Sinclair Gauges are inserted into a fired, unprimed shortened case and then chambered into your rifle. The insert pushes back into the case when it contacts the end of y
Discussed in 6.5 creedmoor freebore questions on Thompson centers in the Long Range Hunting Forums community
1.925" is SAAMI chamber length. Take a flat base bullet. Put bullet in brass, nose first with light neck tension. Long OAL so bullets will be pushed back into case when chambered. ... ... more