.30-378 Weatherby vs 30 XC
A to-scale size comparison of the .30-378 Weatherby and the 30 XC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.30-378 Weatherby (left) beside 30 XC (right), shown at the same scale.
The .30-378 Weatherby has an overall length of about 3.75″ with a 0.308″ 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 .30-378 Weatherby. See the full reference for each: .30-378 Weatherby and 30 XC.