From the Kynoch website:

.375 H&H Belted Magnum

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The .375 Belted Rimless Magnum Nitro Express needs no introduction. It is considered by many as the most versatile cartridge ever produced. Introduced by Holland & Holland in 1912 for their bolt action rifles it is available in three bullet weights and there is no big game in the world that has not been taken with this round at some time or another.

What more needs to be said?

Regards,
Curl