6.5-284 Norma vs .284 Winchester
A to-scale size comparison of the 6.5-284 Norma and the .284 Winchester, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6.5-284 Norma (left) beside .284 Winchester (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 .284 Winchester runs about 2.80″ on a 0.284″ bullet. That makes the 6.5-284 Norma about 1.2x the overall length of the .284 Winchester. See the full reference for each: 6.5-284 Norma and .284 Winchester.