This is a factory replacement size button for use with Redding sizing dies for bottleneck cases. These size buttons are carefully machined from quality steel alloy and then hand finished and inspected to ensure consistent, reliable performance.
- 375 H&H Magnum
- 375 Remington Ultra Magnum
- 375 H&H Magnum Ackley Improved 40 degree shoulder
- 375 Weatherby Magnum
- 378 Weatherby Magnum