.223 Remington vs .416 Barrett
A to-scale size comparison of the .223 Remington and the .416 Barrett, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.223 Remington (left) beside .416 Barrett (right), shown at the same scale.
The .223 Remington has an overall length of about 2.26″ with a 0.225″ bullet. The .416 Barrett runs about 4.95″ on a 0.416″ bullet. That makes the .416 Barrett about 2.2x the overall length of the .223 Remington. See the full reference for each: .223 Remington and .416 Barrett.