6 Dasher vs .300 WSM
A to-scale size comparison of the 6 Dasher and the .300 WSM, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6 Dasher (left) beside .300 WSM (right), shown at the same scale.
The 6 Dasher has an overall length of about 2.25″ with a 0.243″ bullet. The .300 WSM runs about 2.86″ on a 0.309″ bullet. That makes the .300 WSM about 1.3x the overall length of the 6 Dasher. See the full reference for each: 6 Dasher and .300 WSM.