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Joined: Mar 2009
Posts: 72
Campfire Greenhorn
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OP
Campfire Greenhorn
Joined: Mar 2009
Posts: 72 |
Hi
I was wondering if any of the smiths on the forum could give me an idea as to how much I should expect the headspace of a new barrel to reduce when I torque it in to the action as opposed to when I run the action on hand tight when its on the lathe?
I was thinking I should torque the barrel up to about 65 ft/lbs
Thanks
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Joined: Jun 2012
Posts: 1,313
Campfire Regular
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Campfire Regular
Joined: Jun 2012
Posts: 1,313 |
Usually .001 for chrome Moly and .002 for stainless steel. YMMV
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Joined: Oct 2008
Posts: 1,628
Campfire Regular
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Campfire Regular
Joined: Oct 2008
Posts: 1,628 |
I give my final chamber depth an additional .003 to allow for the crush.
Lock, Stock and Barrel gunworks
SLC, Ut
USMC 69-73
"This is my rifle, there are many like it but this one is mine. My rifle is my best friend, it is my life."
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Joined: Mar 2009
Posts: 72
Campfire Greenhorn
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OP
Campfire Greenhorn
Joined: Mar 2009
Posts: 72 |
Excellent.
Thanks very much
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Joined: Jun 2004
Posts: 886
Campfire Regular
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Campfire Regular
Joined: Jun 2004
Posts: 886 |
We get .0015 max crush at 100 foot pounds. We chamber to zero plus .002 and after torque up get .0005" clearance on the Go. On a pure field gun I like to see .001 to .0015 clearance. If we get too short some dies may not set the shoulder back far enough but with factory ammo there is miles of room.
"Hired Gun" Quickest and fastest all motor sand car on the planet.
3.008 at 104.8 300' of sand.
NRA Patron Life Member, Gunsmith, Instructor, Chief RSO
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Joined: Mar 2009
Posts: 72
Campfire Greenhorn
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OP
Campfire Greenhorn
Joined: Mar 2009
Posts: 72 |
Thanks again all good info, Do you find that the amount of crush varies with different tenon threads I.E:- does a remmy crush up more/less than perhaps a mauser or tikka?
Thanks
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