.223 Remington vs 6.5-284 Norma
A to-scale size comparison of the .223 Remington and the 6.5-284 Norma, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.223 Remington (left) beside 6.5-284 Norma (right), shown at the same scale.
The .223 Remington has an overall length of about 2.26″ with a 0.225″ bullet. The 6.5-284 Norma runs about 3.23″ on a 0.264″ bullet. That makes the 6.5-284 Norma about 1.4x the overall length of the .223 Remington. See the full reference for each: .223 Remington and 6.5-284 Norma.