How much torque do you apply on installing a barrel?
Oh boy. OK, I confess, I use ~150 ft-lbs with antisieze on the threads and on the mating faces of the recoil lug and the barrel. The reason is to maintain tension in the joint in the face of differential thermal expansion between the barrel and the receiver. For those interested, the quantative explanation of differential thermal expansion (and other stresses on the threads and their effect on barrel stability) and what it does is in Rifle Accuracy Facts.
That's what I do, and why I do it.
125, 150 ft. lbs. or torque...**** that's alot. I've rebuilt a few motors in my day and usually torqued head bolts to 60. But then again motors and guns are...well to steal a phrase from Chad...like apples and oranges. Just curious how are you able to apply that kinda force...afterall it's not like you can slap a socket or a big wrench to the barrel...so how's it done?