Weatherby Select Plus, 6.5-300 Weatherby, 156Gr, Berger EOL Elite Hunter, 20 Round Box R653156EH Ultra-high velocity, magnum ammunition is how Roy Weatherby got started in the 1940s. Today, those same performance qualities are every bit a part of Weatherby cartridges. When combined with a Weatherby rifle, Nothing Shoots Flatter, Hits Harder or Is More Accurate.