.300 Winchester Magnum vs .375 CheyTac
A to-scale size comparison of the .300 Winchester Magnum and the .375 CheyTac, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.300 Winchester Magnum (left) beside .375 CheyTac (right), shown at the same scale.
The .300 Winchester Magnum has an overall length of about 3.34″ with a 0.309″ bullet. The .375 CheyTac runs about 4.46″ on a 0.375″ bullet. That makes the .375 CheyTac about 1.3x the overall length of the .300 Winchester Magnum. See the full reference for each: .300 Winchester Magnum and .375 CheyTac.