.22 LR vs 7mm SAUM
A to-scale size comparison of the .22 LR and the 7mm SAUM, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.22 LR (left) beside 7mm SAUM (right), shown at the same scale.
The .22 LR has an overall length of about 0.98″ with a 0.224″ bullet. The 7mm SAUM runs about 2.83″ on a 0.284″ bullet. That makes the 7mm SAUM about 2.9x the overall length of the .22 LR. See the full reference for each: .22 LR and 7mm SAUM.