.22 LR vs 6.5 PRC
A to-scale size comparison of the .22 LR and the 6.5 PRC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
.22 LR (left) beside 6.5 PRC (right), shown at the same scale.
The .22 LR has an overall length of about 0.98″ with a 0.224″ bullet. The 6.5 PRC runs about 2.96″ on a 0.264″ bullet. That makes the 6.5 PRC about 3.0x the overall length of the .22 LR. See the full reference for each: .22 LR and 6.5 PRC.