Finally got around to messing with my Barloc. I have an old .260 barrel floating around. It's a Savage prefit by Bugholes. My plan is to have the current 6.5 SAUM barrel modified to work with the Barloc (shouldered style, with 2 tapered rings), as well as ordering another barrel, probably a 16-18" .308 from PVA for throwing tracers and mid-range fuckery, maybe subs if Josh has a 1-8 twist blank. Anyway, I have about 2200 rounds on this .260 barrel and I figured it maybe has another 500-1000 rounds left on it if I wanted to push it. I still have a few loads stashed away in a corner somewhere for it. So I went to see if it would work with the Barloc.
Off the bat, no-go. You're going to need to either modify your savage barrel nut, or order an ARC barrel nut meant for the Barloc. I was going to try to run the shouldered barloc with the savage nut... The Savage nuts have too many threads on them, and not a long enough threaded section of barrel to squeeze the barloc system in. The fix is to lop off the non-keyed portion of the savage nut, then cut away (boring bar) several of the internal threads. I left 5-6 threads on the inside of mine, which should be enough to bear the load. Boring the threads away like this makes a "shelf" that covers up the forward-most barrel threads so it's just smooth barrel infront of the nut, not threads.
Finally, I flipped the nut around and cut a 30 degree chamfer on the back side, which appears to be pretty close to what ARC is using on the tapered rings. Below are a few pictures. It will probably be several weeks (months, probably) before I get around to actually using this, but I'm pretty excited for the switch-barrel capability.
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