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Rifles, Reloading, Optics, Equipment
Gunsmithing
Extraction problems 6/284
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<blockquote data-quote="Hired Gun" data-source="post: 1051440" data-attributes="member: 1290"><p>Even the world famous Ken Brooks from the AGI gunsmith school who worked under Long time Lassen gunsmith school head instructor Bob Dunlap for over 20 years doesn't use headspace gauges. They go off a new brass. For target rifles it's very common to size the chamber to a lot of brass to minimize the working of that brass. As long as you are able to resize it enough to chamber easily a short chamber will not cause extraction problems. Even if it was exact sammi specs right between go and no go factory new brass can be up to .010" short and still be in spec. Point is that a short chamber will not cause hard extraction. </p><p> </p><p>What can cause hard extraction is an action that is out of time on the bolt handle due to cutting too much from the bolt lugs, or lug abutments or combination of both to cause the loss of primary extraction from the action. This is very common from a smith that means well but just carve away not knowing the consequences. Has the action been trued ever in it's past? Only way to know is if you owned it since new. The other thing that will cause hard extraction is brass that is expanded down near the base where the full length die will not reach. How does it act with new brass?</p></blockquote><p></p>
[QUOTE="Hired Gun, post: 1051440, member: 1290"] Even the world famous Ken Brooks from the AGI gunsmith school who worked under Long time Lassen gunsmith school head instructor Bob Dunlap for over 20 years doesn't use headspace gauges. They go off a new brass. For target rifles it's very common to size the chamber to a lot of brass to minimize the working of that brass. As long as you are able to resize it enough to chamber easily a short chamber will not cause extraction problems. Even if it was exact sammi specs right between go and no go factory new brass can be up to .010" short and still be in spec. Point is that a short chamber will not cause hard extraction. What can cause hard extraction is an action that is out of time on the bolt handle due to cutting too much from the bolt lugs, or lug abutments or combination of both to cause the loss of primary extraction from the action. This is very common from a smith that means well but just carve away not knowing the consequences. Has the action been trued ever in it's past? Only way to know is if you owned it since new. The other thing that will cause hard extraction is brass that is expanded down near the base where the full length die will not reach. How does it act with new brass? [/QUOTE]
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Extraction problems 6/284
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