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7.7mm Japanese

The 7.7 x 58mm Japanese enjoyed mild popularity among American hunters after World War II, when surplus military rifles were imported to the U.S. The cartridge was adopted by the Japanese military in 1939 in the Model99 Arisaka rifle as a replacement for the older 6.5mm cartridge but both remained in service during World War II. Some handloaders form 7.7 cases from .30-06cases, but since the latter has a slightly smaller base diameter the best bet is to buy Normaammunition and reload those cases. Ballistically, the 7.7 falls between the .300 Savage and .308 Winchester. Bullets of .311" diameter (same as the .303 British) are available from Hornady, Sierra, and Speer. A 150 grain spitzer pushed to 2500 fps with H414, H335, or H4895 is a good choice for deer size game at close to medium ranges. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.

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ID: Bullet weight: Bullet name: Powder:  
150 grs
Hornady Spire Point
150 grs
Hornady .312 SP
Hodgdon Varget
180 grs
Hungarian Yellow Tip .3105 (Lead Core)
IMR 4064
147 grs
Czech Light Ball Silver Tip (Steel core)
IMR 4895
174 grs
Hornady R.N.
IMR 4064
150 grs
Hornady .312
174 grs
Hormady .3105" FMJ
150 grs
Hormady .312" SP
126 grs
Lapua FMJ
IMR 4064
150 grs
Sierra Pro Hunter
IMR 4064
150 grs
7.62x54r boat tail bullets
Reloader 15
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