RA, the manufacturer, says 200 in-lbf.
Wolverine, the distributor, calls for 250.
250 in-lbf is crazy high for a 5/16 (any pitch) bolt. Every time you torque to 250, you're stretching the bolt. You might get away with it if you're using a new bolt every time, otherwise you're on borrowed time.
Side note, there's no place for thread lock on a heli-coil.
I use 18 ft-lbf or 220 in-lbf as my own spec.
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@ skatemike, I've removed the brake off my x39 barrel with just a wrench. I was surprised how easy it came off.
Yeah I took my barrel off for the first time this weekend and when i torqued back on i used 200 inch pounds with my brand new torque wrench. anything more than that felt really unnecessary and would require mega force.