6-284 Winchester vs 6.5 Creedmoor
A to-scale size comparison of the 6-284 Winchester and the 6.5 Creedmoor, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6-284 Winchester (left) beside 6.5 Creedmoor (right), shown at the same scale.
The 6-284 Winchester has an overall length of about 3.05″ with a 0.243″ bullet. The 6.5 Creedmoor runs about 2.83″ on a 0.264″ bullet. That makes the 6-284 Winchester about 1.1x the overall length of the 6.5 Creedmoor. See the full reference for each: 6-284 Winchester and 6.5 Creedmoor.