.243 Winchester vs .308 Winchester
A to-scale size comparison of the .243 Winchester and the .308 Winchester, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.243 Winchester (left) beside .308 Winchester (right), shown at the same scale.
The .243 Winchester has an overall length of about 2.71″ with a 0.243″ bullet. The .308 Winchester runs about 2.81″ on a 0.309″ bullet. The two are close in overall length. See the full reference for each: .243 Winchester and .308 Winchester.