243 hands down, but for exotic flavor that 300 blk can cover alot of territory, im just crazy about mine. 110/125 supers to 300 yds, or 100 yd subsonics with recoil that a sissy could smile about. Ruger ranch 16" bbl in 300 blk like $425 already has picatinny rail.
South Texas Trophy Outfitters
Contact #: 210-837-6742