.243 Winchester vs .300 Norma Magnum
A to-scale size comparison of the .243 Winchester and the .300 Norma Magnum, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.243 Winchester (left) beside .300 Norma Magnum (right), shown at the same scale.
The .243 Winchester has an overall length of about 2.71″ with a 0.243″ bullet. The .300 Norma Magnum runs about 3.68″ on a 0.308″ bullet. That makes the .300 Norma Magnum about 1.4x the overall length of the .243 Winchester. See the full reference for each: .243 Winchester and .300 Norma Magnum.