7mm Express and .280 Remington are the same cartridge, the Express was Remington's failed attempt to pump new life into the overlooked .280. It caused lots of confusion as some hunters thought that the Express and 7mm Remington Magnum were the same. Firing an express cartridge in a rifle chambered for the Magnum resulted in a ruptured case and in many instances a damaged rifle. This came about during the time I was working in the Browning Arms Co. gunsmithing shop, I repaired several magnum BAR rifles that had fired Express ammo. I still have the ruptured cases that I removed from those rifles, they are split lengthwise for nearly the entire length and the head was really welded into the bolt face especially the ejector hole.
