.300 Winchester Magnum vs .300 Norma Magnum
A to-scale size comparison of the .300 Winchester Magnum and the .300 Norma Magnum, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.300 Winchester Magnum (left) beside .300 Norma Magnum (right), shown at the same scale.
The .300 Winchester Magnum has an overall length of about 3.34″ with a 0.309″ bullet. The .300 Norma Magnum runs about 3.68″ on a 0.308″ bullet. That makes the .300 Norma Magnum about 1.1x the overall length of the .300 Winchester Magnum. See the full reference for each: .300 Winchester Magnum and .300 Norma Magnum.