Craig Boddington was the senior contributing editor of our modern gun and ammunition caliber dictionary. Craig was involved in the development and testing of many of these and writes from first hand experience. This dictionary was written exclusively for Wholesale Hunter with unique information found nowhere else.
GUN CALIBER DICTIONARY
Rifle
7.5X55mm Swiss
The 7.5X55mm Swiss (7.5X55mm Swiss Schmidt-Rubin) dates back to 1889, originally with a bullet diameter of .299-inch. In 1911 a 174-grain spitzer bullet was adopted and the bullet diameter was changed to .308-inch (same as the American .30-caliber). The 7.5X55mm Swiss was chambered to succeeding variations of the Schmidt-Rubin straight-pull action, but the 1911 version was faster and loaded to higher pressure, so current loadings must not be used in original Model 1889 rifles. The standard military load used a 174-grain bullet at 2560 fps. Current factory loads are similar, so performance is essentially the same as the 7.62X51mm NATO. — Craig Boddington