.243 Ackley Improved vs 30 XC
A to-scale size comparison of the .243 Ackley Improved and the 30 XC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.243 Ackley Improved (left) beside 30 XC (right), shown at the same scale.
The .243 Ackley Improved has an overall length of about 2.71″ with a 0.243″ bullet. The 30 XC runs about 4.21″ on a 0.308″ bullet. That makes the 30 XC about 1.6x the overall length of the .243 Ackley Improved. See the full reference for each: .243 Ackley Improved and 30 XC.