Dear Clark,
You have a most unfortunate situation there. Inasmuch as your rifle is "new". Have you considered sending it back to the company to have it re-regulated? If it is shooting good with each bbl. individually you might want to at least ask the company what they would charge to do the work. Considering the cost of components to experiment with to "maybe" get it shooting properly, it might be a cheaper and quicker alternative. Just a thought. SP2