every company has the occasional dud.You’re not alone in such situations. Every year it comes up for someone and I’ve chased problems with a top tier barrel until I finally cut my losses and walked away from the entire gun - two decades later I still get heartburn thinking about how expensive the barrel installation was and accuracy no better than what came from the factory.
I recently had a C6 barrel that wouldn't shoot. After checking the usual suspects to no avail, I slugged the barrel and found the bore was TIGHT just ahead of the throat.
I sent it back and they agreed and warrantied it.
@NorthIdahoDude you could have it slugged to rule out the bore.