7mm SAUM vs .416 Barrett
A to-scale size comparison of the 7mm SAUM and the .416 Barrett, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
7mm SAUM (left) beside .416 Barrett (right), shown at the same scale.
The 7mm SAUM has an overall length of about 2.83″ with a 0.284″ bullet. The .416 Barrett runs about 4.95″ on a 0.416″ bullet. That makes the .416 Barrett about 1.8x the overall length of the 7mm SAUM. See the full reference for each: 7mm SAUM and .416 Barrett.