Got a 7 mag that needs a new barrel, wondering if it would be worth rechambering the new barrel to a STW. Whichever the cartridge, the barrel will be 26'' long in a Sendero contour. Think its worth the hassle to switch? I am using either 168 gr Bergers or their 180gr bullet. Gun weight is about 9.5 lbs. I'm pushing the 168s @3050fps.