The 30-30 Winchester has been listed as the 7.62X 51R in Europe since 1900! Like all cartridges listed in Europe converted from other countries this is also a mish-mash of confusion. However the 30-30 Winchester was listed in Europe as 7.62X51mmR before the 308, ( 7.62X51mm NATO and 30 CAL T-65) or the 307 Winchester even existed!

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That's right , but today not longer to avoid any possibility of confusion with other cartridges like the 7,62 x51 NATO or the 307 Winchester .