Arisaka Model 99 Japanese Service Rifle

Loads for the Jap Arisaka 7.7x58mm


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Arisaka Model 99 Japanese Service Rifle
Arisaka Model 99 Japanese Service Rifle

Q: I have a Japanese Type 99 Arisaka rifle with an excellent bore. I’d like to reload some ammunition for it to compete in Military Rifle competition.I have 100 once-fired Norma cases but want to know the best powder and projectiles to use? Also, can you suggest some loads with the Speer 125gn and 150gn bullets?

Dave Nelson

A: The 7.7 Jap uses the same bullets as the .303 British which have a diameter of .311. In fact, the military 7.7mm is almost identical to the Mark VII .303 loading. Muzzle velocity of the 7.7’s 174gn bullet is 2400fps as compared with the .303’s 2440fps. A mate of mine is loading 46gn of AR2206H behind the 125gn Speer for about 2800fps and 43gn with the 150gn bullet for 2720fps. Work up from 2 grains below just to be on the safe side.

The 7.7mm Jap Cartridge can shoot the same bullets as the .303 British.
The 7.7mm Jap Cartridge can shoot the same bullets as the .303 British.


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Nick Harvey

Nick Harvey is one of the world's most experienced and knowledgeable gun writers, a true legend of the business. He has been writing about firearms and hunting for more than 65 years, has published many books and uncounted articles, and has travelled the world to hunt and shoot. His reloading manuals are highly sought after, and his knowledge of the subject is unmatched. He has been Sporting Shooter's Gun Editor for longer than anyone can remember. Nick lives in rural NSW, Australia.

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