6.5 Creedmoor vs .300 Remington Ultra Magnum
A to-scale size comparison of the 6.5 Creedmoor and the .300 Remington Ultra Magnum, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6.5 Creedmoor (left) beside .300 Remington Ultra Magnum (right), shown at the same scale.
The 6.5 Creedmoor has an overall length of about 2.83″ with a 0.264″ bullet. The .300 Remington Ultra Magnum runs about 3.60″ on a 0.309″ bullet. That makes the .300 Remington Ultra Magnum about 1.3x the overall length of the 6.5 Creedmoor. See the full reference for each: 6.5 Creedmoor and .300 Remington Ultra Magnum.