6.5 PRC vs .375 CheyTac
A to-scale size comparison of the 6.5 PRC and the .375 CheyTac, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6.5 PRC (left) beside .375 CheyTac (right), shown at the same scale.
The 6.5 PRC has an overall length of about 2.96″ with a 0.264″ bullet. The .375 CheyTac runs about 4.46″ on a 0.375″ bullet. That makes the .375 CheyTac about 1.5x the overall length of the 6.5 PRC. See the full reference for each: 6.5 PRC and .375 CheyTac.