6.5-284 Norma vs .416 Barrett
A to-scale size comparison of the 6.5-284 Norma and the .416 Barrett, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6.5-284 Norma (left) beside .416 Barrett (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 .416 Barrett runs about 4.95″ on a 0.416″ bullet. That makes the .416 Barrett about 1.5x the overall length of the 6.5-284 Norma. See the full reference for each: 6.5-284 Norma and .416 Barrett.