I am building another rifle. I want to put an 18"-20" tube on it. I am looking for a premium barrel. Looked at compass lake for a bartlein barrel, lead time is 5-8weeks. same with several other premium barrels. What is the skinny on Proof? about the same cost for a finished bartlein barrel. Are barrels like Faxon in the same league? Looking to wring out as much accuracy as I can shoot. Wil probably shoot it suppressed as well. thanks all.