.243 Winchester vs 7mm-300 PRC
A to-scale size comparison of the .243 Winchester and the 7mm-300 PRC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.243 Winchester (left) beside 7mm-300 PRC (right), shown at the same scale.
The .243 Winchester has an overall length of about 2.71″ with a 0.243″ bullet. The 7mm-300 PRC runs about 3.70″ on a 0.284″ bullet. That makes the 7mm-300 PRC about 1.4x the overall length of the .243 Winchester. See the full reference for each: .243 Winchester and 7mm-300 PRC.