I would have to think you've touched on everything. It looks good as far as surface finish and the chambering went well....it just shoots like garbage.Curious tangent here - if slugging a bore, borescope inspection, and measured run-out dont indicate any manufacturing issues, what do you think is a reasonable expectation from a barrel manufacturer?
I didn't slug it because they wanted it back dirty, but hearing these stories I just elected to take a $425 loss vs that plus shipping to hear a story. I lost a lot of faith with the "10 twist isn't enough".