6mm Creedmoor vs .338 Winchester Magnum
A to-scale size comparison of the 6mm Creedmoor and the .338 Winchester Magnum, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6mm Creedmoor (left) beside .338 Winchester Magnum (right), shown at the same scale.
The 6mm Creedmoor has an overall length of about 2.80″ with a 0.243″ bullet. The .338 Winchester Magnum runs about 3.34″ on a 0.338″ bullet. That makes the .338 Winchester Magnum about 1.2x the overall length of the 6mm Creedmoor. See the full reference for each: 6mm Creedmoor and .338 Winchester Magnum.