.454 is still a .45 caliber weapon. If you research, most ".45" is not exactly .4500000. It may vary depending from 45 ACP to 45 Colt to 454 Casull to 460 S&W Magnum to 45 Schofield. Actual measurements range from .450 to .451 to .452 to .454
And in rifle rounds, 45-70 and the 458 SOCOM are both generally .458.
And in rifle rounds, 45-70 and the 458 SOCOM are both generally .458.