Cases for the . 280 RCBS could be formed by firing . 280 Remington ammo in a rifle chambered for the former .
Ackley abandoned the 7mm - 06 Improved and started chambering rifles for the . 280 RCBS .
Since cases for the . 280 RCBS could be formed by firing . 280 Remington ammo in a rifle chambered for the former , Ackley abandoned the 7mm - 06 Improved and started chambering rifles for the . 280 RCBS .