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https://en.wikipedia.org/wiki/.400_H%26H_Magnum


Article about this in AMERICAN RIFLEMAN --this months issue

Anyone use this or have any experience with it..was talking to a custom gunmaker this morning who told me to read this article..

Apparently Dakota Arms is producing rifles in this caliber...per the article

Interesting...

Ripp

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I have the first set of reamers ground in the US.

Chambered a test barrel, made dies, used a strain gauge system for load development. Have a lot of load data and sent it off to H&H years ago per their request.

This cartridge is easy to work with and is very efficient, much more so than the 416 Rem. Easy to obtain 2400 ft/sec at moderate pressure. A perfect cast bullet cartridge.

.411 bullet diameter.