.223 Remington vs .375 CheyTac
A to-scale size comparison of the .223 Remington and the .375 CheyTac, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.223 Remington (left) beside .375 CheyTac (right), shown at the same scale.
The .223 Remington has an overall length of about 2.26″ with a 0.225″ bullet. The .375 CheyTac runs about 4.46″ on a 0.375″ bullet. That makes the .375 CheyTac about 2.0x the overall length of the .223 Remington. See the full reference for each: .223 Remington and .375 CheyTac.