I'm sure like many other topics here on AH, this topic has been examined over and over. But I haven't been able to find anything here recently. If someone has a link to a thread here regarding this topic, I would welcome it. Specifically, velocity loss with a .458WM, .416 Remington Mag, .416 Taylor and .375 H and H with barrels from 25" to 22". I know some cartridges like the .375 and .416 Rugers plus the B & Ms were designed to obtain maximum velocities with 20" or shorter barrels, but what about the older designed cartridges? And is the velocity loss of any REAL WORLD hunting significance? Thanks!