.243 Winchester vs 6.5 PRC
A to-scale size comparison of the .243 Winchester and the 6.5 PRC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.243 Winchester (left) beside 6.5 PRC (right), shown at the same scale.
The .243 Winchester has an overall length of about 2.71″ with a 0.243″ bullet. The 6.5 PRC runs about 2.96″ on a 0.264″ bullet. That makes the 6.5 PRC about 1.1x the overall length of the .243 Winchester. See the full reference for each: .243 Winchester and 6.5 PRC.