Originally Posted by MOOSE39465
The action is from a 2010 Sendero 300 win mag so it should still be tight. Installing the shims behind the go gauge? Is that the same as checking it with a no go gauge? If so I have access to one through a friend of mine. I can order a go gauge the same time I order my bolt.
The go gauge is a way of determining the minimum head space.
The no gauge is for determining if you have excessive head space (If the bolt will close of the
No Go Gauge you have to much head space) and it could be dangerous or at least hard on brass.
I use the go gauge and set the head space depending on the rifles use and accuracy requirements
by placing one shim at a time increasing the measurement by .001 at a time.
If the bolt wont close on the go gauge you dont have enough head space, If it does, add shims
one at a time until it feels tight (Caution ; Don't force the bolt to close because the gauge is
heat treated and may/can damage the chamber) also remove the ejector plunger before using
ether gauge or you may get a false reading.
You don't have to remove the extractor, just the ejector.
If your not sure about any of this try to find a good smith to check it out for you.
Hope this helps
J E CUSTOM