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Old February 23, 2013, 08:47 AM   #15
Bart B.
Senior Member
 
Join Date: February 15, 2009
Posts: 4,391
AR15barrels, I like your .pdf file on doing all the right stuff to fit a barrel to a Rem. 7XX receiver. It reminds me of what one of the service rifle teams (USMC, I think) did back in the '70's fitting 1" to 2" thick recoil lugs on .30 caliber magnum match barrels to Rem 700 receivers in an attempt to eliminate the receivers' twisting in full epoxy bedding contact. The torque of 190 and 200 grain bullets leaving at 3000 fps was/is enough to cause accuracy problems after a couple hundred shots. And those round receivers had no flat surfaces to resist torque like a 4- or 6-flat bolt head does. One of the 'smiths at their rifle shop told me of the issues for determining barrel tenon length based on how thick the recoil lug was. Your instructions made me remember it all over.
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