7mm SAUM vs .300 Remington Ultra Magnum
A to-scale size comparison of the 7mm SAUM and the .300 Remington Ultra Magnum, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
7mm SAUM (left) beside .300 Remington Ultra Magnum (right), shown at the same scale.
The 7mm SAUM has an overall length of about 2.83″ with a 0.284″ 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 7mm SAUM. See the full reference for each: 7mm SAUM and .300 Remington Ultra Magnum.