7mm-300 PRC vs .300 Winchester Magnum
A to-scale size comparison of the 7mm-300 PRC and the .300 Winchester Magnum, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
7mm-300 PRC (left) beside .300 Winchester Magnum (right), shown at the same scale.
The 7mm-300 PRC has an overall length of about 3.70″ with a 0.284″ bullet. The .300 Winchester Magnum runs about 3.34″ on a 0.309″ bullet. That makes the 7mm-300 PRC about 1.1x the overall length of the .300 Winchester Magnum. See the full reference for each: 7mm-300 PRC and .300 Winchester Magnum.