30 XC vs .416 Barrett
A to-scale size comparison of the 30 XC and the .416 Barrett, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
30 XC (left) beside .416 Barrett (right), shown at the same scale.
The 30 XC has an overall length of about 4.21″ with a 0.308″ bullet. The .416 Barrett runs about 4.95″ on a 0.416″ bullet. That makes the .416 Barrett about 1.2x the overall length of the 30 XC. See the full reference for each: 30 XC and .416 Barrett.