Buy 375 H&H MAG 260GR PARTITION TROPHY GRADE AMMUNITION. Nosler Trophy Grade™ ammunition is loaded with the Nosler Partition® bullet – the benchmark for hunting bullets since 1948 and the cornerstone upon which the entire company was founded. The bullet’s dual-core design assures rapid expansion of the foremost core while Nosler’s integral partition supports the expanded mushroom allowing the enclosed rear core to remain intact retaining more than two-thirds the original bullet weight for deep penetration. Tried and true, Nosler’s Trophy Grade™ ammunition provides undeniable reliability on all game