.30-378 Weatherby vs .338 Norma Magnum
A to-scale size comparison of the .30-378 Weatherby and the .338 Norma Magnum, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.30-378 Weatherby (left) beside .338 Norma Magnum (right), shown at the same scale.
The .30-378 Weatherby has an overall length of about 3.75″ with a 0.308″ bullet. The .338 Norma Magnum runs about 3.68″ on a 0.339″ bullet. The two are close in overall length. See the full reference for each: .30-378 Weatherby and .338 Norma Magnum.