I wish I had the round barrel to know. I got this basket case because the previous owner twisted the receiver when removing the receiver, so I bought everything minus the receiver, and found a receiver of the exact same year, just a few hundred numbers higher, that was missing everything else. It had a round barrel because you can see the ghost line from where it used to sit.
So I am building me a Frankenstein, if you will.
If one were to go by the TPI as an indicator, the torque is in the #100# range ( going off memory), but a search online shows some use hand tight, others 50#, and some 150#.
I know I can put on an action wrench with an extension arm and get this to align, but want to be cautious and not damage it, but the same time, If I take .001 off the shoulder and it indexes hand tight, but needs torqued, I will over clock it and be back to where I started, or worse.
So, I?m kind of stuck making a decision I guess.