6.5-284 Norma vs .300 WSM
A to-scale size comparison of the 6.5-284 Norma and the .300 WSM, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6.5-284 Norma (left) beside .300 WSM (right), shown at the same scale.
The 6.5-284 Norma has an overall length of about 3.23″ with a 0.264″ bullet. The .300 WSM runs about 2.86″ on a 0.309″ bullet. That makes the 6.5-284 Norma about 1.1x the overall length of the .300 WSM. See the full reference for each: 6.5-284 Norma and .300 WSM.