I wouldn't recommend the Winchester BST's for any "hard contact". They're a rather fragile built bullet, so they're ideal for a "heart/lung shot" behind the shoulder. A 7mm-08 with a 140grn pill is hard enough hitting that it will break the shoulder and penetrate well enough, but I wouldn't trust it to be a reliable kill. Hitting near side bone, that thing will shatter and the jacket will separate from the core - been there, done that.