.243 Winchester vs 7mm SAUM
A to-scale size comparison of the .243 Winchester and the 7mm SAUM, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.243 Winchester (left) beside 7mm SAUM (right), shown at the same scale.
The .243 Winchester has an overall length of about 2.71″ with a 0.243″ bullet. The 7mm SAUM runs about 2.83″ on a 0.284″ bullet. The two are close in overall length. See the full reference for each: .243 Winchester and 7mm SAUM.