Weatherby ammunition offers a variety of premium grade bullets that are carefully selected for specific hunting applications To meet varying needs, weatherby proudly load the Norma Spitzer The Spitzer bullets are made by Norma of Sweden, a company renowned for the high quality of its products Weatherby chose two of the most popular bullet weights for its ammunition The 257 Weatherby Mag ammo is loaded with a 100-grain Spitzer, while the 300 Weatherby Mag is loaded with a 180-grain Spitzer With 60 percent weight retention, the bullets are suited to a wide range of hunting applications