.243 Winchester vs 7mm PRC
A to-scale size comparison of the .243 Winchester and the 7mm PRC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.243 Winchester (left) beside 7mm 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 PRC runs about 3.34″ on a 0.284″ bullet. That makes the 7mm PRC about 1.2x the overall length of the .243 Winchester. See the full reference for each: .243 Winchester and 7mm PRC.