6mm Creedmoor vs 6.5-284 Norma
A to-scale size comparison of the 6mm Creedmoor and the 6.5-284 Norma, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6mm Creedmoor (left) beside 6.5-284 Norma (right), shown at the same scale.
The 6mm Creedmoor has an overall length of about 2.80″ with a 0.243″ bullet. The 6.5-284 Norma runs about 3.23″ on a 0.264″ bullet. That makes the 6.5-284 Norma about 1.2x the overall length of the 6mm Creedmoor. See the full reference for each: 6mm Creedmoor and 6.5-284 Norma.