.223 Remington vs 6.8 Western
A to-scale size comparison of the .223 Remington and the 6.8 Western, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.223 Remington (left) beside 6.8 Western (right), shown at the same scale.
The .223 Remington has an overall length of about 2.26″ with a 0.225″ bullet. The 6.8 Western runs about 2.96″ on a 0.278″ bullet. That makes the 6.8 Western about 1.3x the overall length of the .223 Remington. See the full reference for each: .223 Remington and 6.8 Western.