6mm Creedmoor vs 7mm-300 PRC
A to-scale size comparison of the 6mm Creedmoor and the 7mm-300 PRC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6mm Creedmoor (left) beside 7mm-300 PRC (right), shown at the same scale.
The 6mm Creedmoor has an overall length of about 2.80″ with a 0.243″ bullet. The 7mm-300 PRC runs about 3.70″ on a 0.284″ bullet. That makes the 7mm-300 PRC about 1.3x the overall length of the 6mm Creedmoor. See the full reference for each: 6mm Creedmoor and 7mm-300 PRC.