My friend, Mike McNulty, had come over to my house, as we were planning to do the necessary load development for an upcoming safari to Zimbabwe. With his beloved Heym Express .505 Gibbs in tow, we knew we had a great load using the standard 525-grain bullets—long proven in the voluminous case—but Mike was interested in using 570-grain slugs on this hunt. We’d obtained some premium bonded-core softpoints, and the solids of correlative weight, and consulted the data published by the manufacturer in their own reloading manual.
In order to be safe, we decided to stay 2 grains below the published maximum and carefully loaded up a half-dozen of each bullet.
