6mm Creedmoor vs .300 WSM
A to-scale size comparison of the 6mm Creedmoor and the .300 WSM, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6mm Creedmoor (left) beside .300 WSM (right), shown at the same scale.
The 6mm Creedmoor has an overall length of about 2.80″ with a 0.243″ bullet. The .300 WSM runs about 2.86″ on a 0.309″ bullet. The two are close in overall length. See the full reference for each: 6mm Creedmoor and .300 WSM.