7.7 Jap Reload Data??
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Old 06-26-2011, 05:01 PM   #1
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Default 7.7 Jap Reload Data??

Anybody have any data for the 7.7x58? I have some pulled 7.62x54 .310 dia. 150 gr. (Actually they range from 149 to 150 gr.) boatail spizers and would like to use Reloader-15 if possible (I have a ton of it!!).... As well ive heard people using the military 7.62x54 powder and reducing the load 10-15%... Any thoughts, suggestions?

Ive found that RL-15 is used in quite a few old mil-surps and im sure theres gotta be a load out there.....
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Old 08-21-2011, 04:07 PM   #2
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Just bumping this.... With all the others reloading for old mil-surps, I cant be the only one reloading a old type 99?

I have a new bullet type 150 gr. .311 Speer hot-cor, flat based (not boat tail) any data for it using RL-15?
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Old 08-21-2011, 05:43 PM   #3
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None of my books are showing RL-15.
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Old 08-25-2011, 03:17 PM   #4
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I finally found it!!!! Load data for the 7.7 using RL-15 and other powders!!

The 7.7 Arisaka | Reloading | Guns & Ammo
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Old 12-31-2014, 02:38 AM   #5
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The link doesn't work anymore, do you by chance have a screen shot of this or any info on using powders other than hodgen (only data I can find, not against using, just like having options) and did you find info on using the powder from 7.62x54r
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Old 12-31-2014, 04:00 AM   #6
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They say to use .303 British Data !................But you could just use this...............
http://www.hodgdonreloading.com/data/rifle
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Old 12-31-2014, 05:23 AM   #7
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This is very interesting digest about the 7.7 "Jap". I use the .303 Brit loading data. The 7.7 can be pushed with care 100 fps faster than the American .308. The .308 bullet however is superior as ranges increase. The Japanese violated the Geneva Rules by thinning the jacket in the rear of the bullet and increasing the lead base. This caused the bullet to run nose up causing incredible wounds.

http://www.ballisticstudies.com/Knowledgebase/7.7x58+7.7+Japanese.html
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Old 12-31-2014, 01:01 PM   #8
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Here you go. Use Bing to search for firearms related items
http://www.handloads.com/loaddata/default.asp?Caliber=7.7%20X%2058%20Arisaka&Weight= All&type=Rifle&Source=
Try 180grs. S&B VMSBT.311 with 43.2grs VV N140, primer CCI 200, OAL 81,0mm. Should give groups from 50mm. But use no higher loads this load is close to the maximum. Load datas without any guarantee. The shooters magazine "VISIER" in Germany tested loads with the same bullet and 44.0grs. N140 and wrote that it was the maximum without any sign of to high chamber pressure.( Speed:737m/s, Pressure: 3291bar)
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Old 01-01-2015, 07:33 PM   #9
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Quote:
Originally Posted by CaptMidnight View Post
This is very interesting digest about the 7.7 "Jap". I use the .303 Brit loading data. The 7.7 can be pushed with care 100 fps faster than the American .308. The .308 bullet however is superior as ranges increase. The Japanese violated the Geneva Rules by thinning the jacket in the rear of the bullet and increasing the lead base. This caused the bullet to run nose up causing incredible wounds.

http://www.ballisticstudies.com/Knowledgebase/7.7x58+7.7+Japanese.html

Geneva convention has nothing to do with it. It deals with ethical treatment of captured soldiers. The Hague convention deals with projectiles and weapons of war. The USA was the only country not to sign it. The Brit MKVII .303 bullet uses a hollow nose (not point, still FMJ) causing the bullet to tumble after impact. Seems your info is all wrong. The Japanese used a bullet design to maximize copper, which was in short supply, lead was cheap. BTW, My Dad told me about Marines in the pacific cutting the tips off M2 ball to make it a HP. The Japanese did the same. The Soviets also tried to copy the MKVII bullet, but had little success.
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Old 01-04-2015, 04:33 PM   #10
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Quote:
Originally Posted by BUCKSLAYERR78 View Post
The link doesn't work anymore, do you by chance have a screen shot of this or any info on using powders other than hodgen (only data I can find, not against using, just like having options) and did you find info on using the powder from 7.62x54r
Dont use the old powder... Just throw out for fertilizer.

I have the RL-15 load written down, but none of the others.

My best results have come from using the Horandy 174 gr. .3105 bullet, Greek HXP (30-06) brass, and H4895.

Be careful when using the .303 data, the .303 Rl-15 data would make my brass stick in the chamber, and ruin the brass. Not bad, but just enough...

Another thing I learned, mine do not like Norma brass, its too soft and will bulge in the loose Arisaka chamber. Thats why I like the thicker mil-surp stuff. So far the HXP has the closest base dimension to 7.7 That ive found out of '06 brass
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