0722160807cm July 22, 2016 at: 1500 × 844 In: Modern Intermediate Calibers 003: The 6.8x43mm Remington SPC ← Previous Next → Three 6.8 SPC cartridges and their parent round. Left to right: .30 Remington, 6.8 SPC 115gr Sierra BTHP, 110gr Hornady OTM, XM68GD 90gr soft point.