Weatherby Select Plus 378 Wthby Mag 270 Gr Barnes TSX Lead Free 20. It's the flattest shooting hardest hitting most accurate ammo you can buy. It pairs our magnum design with the most popular bullet offerings from Barnes Hornady Swift Berger and Nosler. With Select Plus there's a bullet option to meet every hunting or shooting situation. Specifications for Weatherby B378270TSX Select Plus 378 Wthby Mag 270 Gr Barnes TSX Lead Free 20 B: Manufacturer: Weatherby Caliber: .378 Weatherby Magnum Number of Rounds: 20 Bullet Type: Flat Nose (FN) Bullet Weight: 270 grain Cartridge Case Material: Brass Muzzle Velocity: 3060 ft/s Application: Hunting Primer Style: Centerfire What is Weatherby B378270TSX Select Plus 378 Wthby Mag 270 Gr Barnes TSX Lead Free 20 B good for? The manufacturer thinks that it is good for hunting.