I have a Savage in 6BR with an 8 twist McGowen barrel that has about 3000 rounds through it. It's still shooting well but I'm starting to think about ordering another barrel. I shoot mainly at 100 yards with Bart's 68 gr Ultras. The Bartlein is cut rifled but is about $100 more than the Shilen. I've had good results with Shilen in the past but never owned a Bartlein. Are they worth the extra money?