.243 Winchester vs .284 Winchester
A to-scale size comparison of the .243 Winchester and the .284 Winchester, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.243 Winchester (left) beside .284 Winchester (right), shown at the same scale.
The .243 Winchester has an overall length of about 2.71″ with a 0.243″ bullet. The .284 Winchester runs about 2.80″ on a 0.284″ bullet. The two are close in overall length. See the full reference for each: .243 Winchester and .284 Winchester.