6.8 Western vs 30 Nosler
A to-scale size comparison of the 6.8 Western and the 30 Nosler, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6.8 Western (left) beside 30 Nosler (right), shown at the same scale.
The 6.8 Western has an overall length of about 2.96″ with a 0.278″ bullet. The 30 Nosler runs about 3.34″ on a 0.309″ bullet. That makes the 30 Nosler about 1.1x the overall length of the 6.8 Western. See the full reference for each: 6.8 Western and 30 Nosler.