"This ONE die and collet is universal and works on ALL of the popular belted magnum calibers including:.257 Weatherby Magnum, 6.5 Remington Magnum, .264 Winchester Magnum, .270 Weatherby Magnum, 7 x 61 Sharpe & Hart, 7mm Remington Magnum, 7mm Weatherby Magnum, 7mm STW, .300 H&H Magnum, .300 Winchester Magnum,.300 Weatherby Magnum,.308 Norma Magnum, 8mm Remington Magnum, .338 Winchester Magnum,.340 Weatherby Magnum, .350 Remington Magnum, .358 Norma Magnum, .375 H&H Magnum, .416 Remington Magnum, .458 Winchester Magnum,.458 Lott Magnum and several belted wildcat cartridges. There are no extra collets to buy when resizing different calibers. The U.S. Secret Service was one of our first customers to purchase this product. "