6-284 Winchester vs 30 XC
A to-scale size comparison of the 6-284 Winchester and the 30 XC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6-284 Winchester (left) beside 30 XC (right), shown at the same scale.
The 6-284 Winchester has an overall length of about 3.05″ with a 0.243″ bullet. The 30 XC runs about 4.21″ on a 0.308″ bullet. That makes the 30 XC about 1.4x the overall length of the 6-284 Winchester. See the full reference for each: 6-284 Winchester and 30 XC.