Common mistakes when reloading .280 Remington ammunition?

Insufficient Case Capacity Considerations

When reloading .280 Remington, it’s essential to consider the case capacity, which can vary between different rifle chambers and cartridges. Over-estimating case capacity can lead to over-charging, resulting in excessive pressure and potential blowouts. Aiming to leave at least 0.050" of case capacity for the charge, as specified in the Hornady reloading manual for the .280 Remington, is a good starting point. This ensures consistent chamber pressures and prevents over-charging.

Propellant Grain and Type Selection

Selecting the wrong propellant grain or type can also impact .280 Remington performance. For example, using a slow-burning powder in a fast-twist barrel can lead to inconsistent velocity and accuracy. In contrast, a fast-burning powder may be suitable for a slower-twist barrel but may not be ideal for higher-pressure cartridges. A good starting point is to use a mid-range powder, such as IMR 4831 or IMR 4895, which balances velocity and pressure.

Chamber and Throat Length Considerations

The .280 Remington rifle’s chamber and throat length can also affect reloading performance. Inadequate throat length can result in insufficient case capacity, while excessive throat length can lead to over-charging. Ensuring that the rifle’s chamber and throat length are compatible with the chosen cartridge and case capacity is crucial. It’s also essential to consult the rifle manufacturer’s specifications and reloading manuals for guidance on optimal case capacity and chamber length.