6mm Creedmoor vs .308 Winchester
A to-scale size comparison of the 6mm Creedmoor and the .308 Winchester, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6mm Creedmoor (left) beside .308 Winchester (right), shown at the same scale.
The 6mm Creedmoor has an overall length of about 2.80″ with a 0.243″ bullet. The .308 Winchester runs about 2.81″ on a 0.309″ bullet. The two are close in overall length. See the full reference for each: 6mm Creedmoor and .308 Winchester.