Groc: thanks much bud. Well, I figured it all out. They sent me a barrel threaded for a .308 MVP. So, I pinged my local gunsmith who's actually retired and only takes the odd job for people he likes. I'd done him some favors so he was happy to recut my tenon. He profiled it down to 1" the whole way down and set it up to zero runout. He also trimmed .020 off of one of my scope rail screws as it was impinging on the barrel threads on the old barrel. A couple days and 100 bucks later and it's recut. My gunsmith had shown me that the barrel nut fitted just fine in a socket but didn't fit in his Snap-On box end wrench. Hmmm.... Last night I slapped it all together. Set it up for zero headspace and realized I didn't have a wrench to tighten down the nut. So I ran to O'Reilly and bought a 1 1/16" box end wrench hoping it'd fit without modification. It did. Then I couldn't find my damned hammer so I grabbed an old shot out 7mag barrel and gave the wrench on barrel nut a swat with the big end. Then I turned toward the muzzle. The flash hider I'd bought wouldn't clock properly without a crush washer. So I grabbed the one I'd found a few days back and put it on. It clocked just right. Dropped it in the stock and snugged everything up. Dropped my Vortex Gen II Razor 3-18 on it and put on the bore collimator. Dialed to my old zero and what do you know... My zero hasn't changed. At least the bore sighted zero. Pics: better view of the flash hider. No real use for it but to look cool. No chance of flash on this 26" monster.