.223 Remington vs 30 XC
A to-scale size comparison of the .223 Remington and the 30 XC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.223 Remington (left) beside 30 XC (right), shown at the same scale.
The .223 Remington has an overall length of about 2.26″ with a 0.225″ bullet. The 30 XC runs about 4.21″ on a 0.308″ bullet. That makes the 30 XC about 1.9x the overall length of the .223 Remington. See the full reference for each: .223 Remington and 30 XC.