planning for a new barrel for a 22-250. I'm planning on shooting groundhogs out to 500 yards, but most will probably be in the 150 to 250 range. Also plan on some local target shooting fun shoots. I plan on using the Nosler 55 grain BT's, but may try some 60 gr. i'm also figuring on a 26-27" long barrel. Checking around to some of the barrelmakers websites, they generally suggest a 1:12 for 55 grain, although some suggest a 1:14 twist. Looking for pro's & cons for one vs the other in a new barrel.