7mm-300 PRC vs 30 XC
A to-scale size comparison of the 7mm-300 PRC and the 30 XC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
7mm-300 PRC (left) beside 30 XC (right), shown at the same scale.
The 7mm-300 PRC has an overall length of about 3.70″ with a 0.284″ bullet. The 30 XC runs about 4.21″ on a 0.308″ bullet. That makes the 30 XC about 1.1x the overall length of the 7mm-300 PRC. See the full reference for each: 7mm-300 PRC and 30 XC.