the barrel until the bolt face makes con- tact with the barrel. You’ll have to back things up until the bolt can be closed freely. At this time try the headspace gauge and back off the barrel lock nut until bolt can be closed down on the GO headspace gauge with some feel. The lock nut wrench is now tightened to the desired foot pounds of torque and the headspace gauge is again tried. This maneuver is applied until such time the correct cartridge headspace is attained. At this stage I put witness marks
The Savage rifl e pictured here is a perfect example of effi cient switch-barrel design as the barrel is removed beneath the mounted scope with action remaining in the stock. The rifl e shown here is a Savage Model 12 with 50mm Bausch & Lomb scope and Picatinny mounts. Shown here is a pre- headspaced Savage barrel with barrel lock nut in fi xed position.
of the shroud has a 0.02" gap between it and the barrel, per se, which I put to good use and will describe later. But fi rst, on to cartridge headspace using the barrel lock nut. With the barrel securely held in
a padded barrel vise, and a lock-nut wrench all ready to go, screw the barrel
lock nut onto the barrel, as far as it will go, with your fi ngers. The recoil lug is then put in place against the barrel lock nut with the receiver engaging lug or pin toward the receiver. At this time the receiver engages the recoil lug and is turned onto the barrel with the bolt in place and carefully screwed farther onto
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* Learn how to chamber barrels that will compete with the best in the world
* Dialing bores straight/true with range rod and .0001” indicators
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on the barrel lock nut and the barrel to refer back to as I remove the receiver from the barrel with an action wrench inserted into the bolt hole. The receiver should loosen at the juncture of the back part of the recoil lug as you look for movement at the witness marks. This is precisely how the barrel will later be removed from the action as it is bolted into the stock. The barrel lock nut is then bonded in place so headspace is permanently maintained without refer- ring back to the witness marks each time a barrel is installed. The barrel lock nut could be fi xed in place with Loc-Tite, a thread locking agent, but I have discov- ered a better way. I simply slide a thin, metal shim between the non-threaded barrel and barrel lock nut shroud coated on both sides with J-B Cold Weld. This does the trick. As the bonding agent is setting I install the barrel in the action and torque it to about 25-foot pounds with the witness marks in alignment. This assures coaxial alignment at the barrel-to-receiver thread juncture. Then, should you later want to
move the barrel lock nut or further ad- just headspace, simply apply heat over the J-B Cold Weld tab and the lock nut can be turned. Re-apply the Cold-Weld tab as needed. I’ve never had a barrel lock nut loosen in changing dozens of barrels with my system of switching barrels on these Savage rifl es. FITTING AN AFTER-MARKET BARREL TO THE SAVAGE 110 SERIES RECEIVER As I get into fi tting custom after-
Pella, IA 641-628-3044
Preparing a stock for pillar bedding during an "Accurizing Factory Rifles" class at Gordy's Precision Gunsmithing shop.
Page 30 October — December 2011
www.ExtremeAccuracyInstitute.com "Extreme Accuracy Series"
Precision Gunsmithing Instructional DVD's available * Call or see our website for details.
market barrels on the Savage Model 110 series, a conventional barrel-to- receiver shoulder is put to use. There is little point in reducing the larger barrel diameter to the smaller Savage barrel diameter and extending the threads for a barrel lock nut. Savage Model 110 Series barrels have a 1.030" breech diameter over the chamber compared to 1.2" to
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