7mm-300 PRC vs .308 Winchester
A to-scale size comparison of the 7mm-300 PRC and the .308 Winchester, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
7mm-300 PRC (left) beside .308 Winchester (right), shown at the same scale.
The 7mm-300 PRC has an overall length of about 3.70″ with a 0.284″ bullet. The .308 Winchester runs about 2.81″ on a 0.309″ bullet. That makes the 7mm-300 PRC about 1.3x the overall length of the .308 Winchester. See the full reference for each: 7mm-300 PRC and .308 Winchester.