.243 Ackley Improved vs 7mm SAUM
A to-scale size comparison of the .243 Ackley Improved and the 7mm SAUM, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.243 Ackley Improved (left) beside 7mm SAUM (right), shown at the same scale.
The .243 Ackley Improved 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 Ackley Improved and 7mm SAUM.