7.7 Japanese

Mark_Mark said:
I was looking for Jacketed bullets locally, .311 is not easy to find
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Midway has most in stock. The 180 is available for speer but not the 150. At .30 cents it's way cheaper per than the others. I'm not sure if there is a difference in performance between the two weights.... as things have gone I don't want to load develop without 400 on hand. I have 400 for the 6x45 of the same bullet.
 
Mark_Mark said:
I was looking for Jacketed bullets locally, .311 is not easy to find
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I've only found it a couple of times at any LGS. I don't know about other online retailers but Graf's has a selection of .311-312 Hornady and PPU bullets in stock. Nice thing about them is if you review a product on their website, you get free shipping on your next order 😊
 
allisd17 said:
I've only found it a couple of times at any LGS. I don't know about other online retailers but Graf's has a selection of .311-312 Hornady and PPU bullets in stock. Nice thing about them is if you review a product on their website, you get free shipping on your next order 😊
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I’m going to try one last shop, going that direction today. If not, then order online.

I don’t think I’m going to try to push those lead bullets at 2200+ fps. Lead will be all over
my barrel
 
Mark_Mark said:
I’m going to try one last shop, going that direction today. If not, then order online.

I don’t think I’m going to try to push those lead bullets at 2200+ fps. Lead will be all over
my barrel
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One thing I've been seriously pondering is the load.... seems like it would be a great fit for cast in 7.7. I believe one of the requirements is a standard bullet weight.
 
GeoDudeFlorida said:
That makes sense. The Mk.VII .303 was defined as a 174gr jacketed bullet. The Jap is probably going to be close.
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Except there are zero 175 7.7 bullets then or now. There are 174 smk bullets but those were obviously not war projectiles.... it seems in this case a specific loading would be more appropriate than a random average.... 🤔
 
AJC1 said:
Except there are zero 175 7.7 bullets then or now. There are 174 smk bullets but those were obviously not war projectiles.... it seems in this case a specific loading would be more appropriate than a random average.... 🤔
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GeoDudeFlorida said:
That makes sense. The Mk.VII .303 was defined as a 174gr jacketed bullet. The Jap is probably going to be close.
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I finally guess something correct! We are not shooting precision rifle, just minute of White Tail or minute of minute of Hog
 
AJC1 said:
Apparently 162 was the issued weight for soldiers. The 200 for machine gun...View attachment 1195953
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162 is pretty close. If you’re going to use Ed Harris’ “The Load” then it’s plenty close enough. Now you need to find a mold.
From Harris’ article:

Four load classifications from Mattern (1932) cover all uses for the cast bullet military rifle. I worked up equivalent charges to obtain the desired velocity ranges with modern powders, which provide a sound basis for loading cast bullets in any post-1898 military rifle from 7mm to 8mm:

1. 125 grain plain based "small game/gallery" 900-1000 f.p.s., 5 grains of Bullseye or equivalent.

2. 150 grain plain based "100-yard target/small game", 1050-1250 f.p.s., 7 grains of Bullseye or equivalent.

3. 170-180 grain gas checked "200 yard target", 1500-1600 f.p.s., 16 grains of Hercules #2400 or equivalent.

4. 180-200 grain gas-checked "deer/600 yard target", 1750-1850 f.p.s., 26 grains of RL-7 or equivalent.

None of these loads are maximum when used in full-sized rifle cases such as the 30-40 Krag, .303 British, 7.65 Argentine, 7.7 Jap, 7.62x54R Russian , or 30-06. They can be used as basic load data in most modern military rifles of 7mm or larger, with a standard weight cast bullet for the caliber, such as 140-170 grains in the 7x57, 150-180 grains in the .30 calibers, and 150-190 grains in the 8mm. For bores smaller than 7mm, consult published data.
 
GeoDudeFlorida said:
162 is pretty close. If you’re going to use Ed Harris’ “The Load” then it’s plenty close enough. Now you need to find a mold.
From Harris’ article:

Four load classifications from Mattern (1932) cover all uses for the cast bullet military rifle. I worked up equivalent charges to obtain the desired velocity ranges with modern powders, which provide a sound basis for loading cast bullets in any post-1898 military rifle from 7mm to 8mm:

1. 125 grain plain based "small game/gallery" 900-1000 f.p.s., 5 grains of Bullseye or equivalent.

2. 150 grain plain based "100-yard target/small game", 1050-1250 f.p.s., 7 grains of Bullseye or equivalent.

3. 170-180 grain gas checked "200 yard target", 1500-1600 f.p.s., 16 grains of Hercules #2400 or equivalent.

4. 180-200 grain gas-checked "deer/600 yard target", 1750-1850 f.p.s., 26 grains of RL-7 or equivalent.

None of these loads are maximum when used in full-sized rifle cases such as the 30-40 Krag, .303 British, 7.65 Argentine, 7.7 Jap, 7.62x54R Russian , or 30-06. They can be used as basic load data in most modern military rifles of 7mm or larger, with a standard weight cast bullet for the caliber, such as 140-170 grains in the 7x57, 150-180 grains in the .30 calibers, and 150-190 grains in the 8mm. For bores smaller than 7mm, consult published data.
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So I dug through pulled bullets and I have a bag of 174 pulled fmj .313 around 250-300 bullets. I have a slightly smaller bag of .314 185 grains hpbt. Based on these pulls I'm betting that unknown half ammo box of brass is 7.7. Probably going to find it to see if the brass chambers. I bet dollars to doughnuts it does.
 
AJC1 said:
So I dug through pulled bullets and I have a bag of 174 pulled fmj .313 around 250-300 bullets. I have a slightly smaller bag of .314 185 grains hpbt. Based on these pulls I'm betting that unknown half ammo box of brass is 7.7. Probably going to find it to see if the brass chambers. I bet dollars to doughnuts it does.
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Be sure to measure case head diameter. 7.7 is a bit larger then 06 & 308. 308, 7.65x53 & a few others will drop right in & go bang.
 
Bcwitt said:
Be sure to measure case head diameter. 7.7 is a bit larger then 06 & 308. 308, 7.65x53 & a few others will drop right in & go bang.
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I had 7.7 cases my dad made from 30-06, and I have purged those as I find them, but I guess it's a common practice. I've even fired a few to no ill effect that I can tell. I keep rangeling up as many properly headstamped cases as possible... if I have a need later I can make them that way.
Thus is the can.... 17087208828482006939855253516631.jpg 17087209055318455801484014829065.jpg 170872098557444893809355592763.jpg
 
I have personally blown a side wall out just like that. Just cuz it works, doesn't make it safe. I'd very strongly suggest getting new 7.7 brass.
 
AJC1 said:
I had 7.7 cases my dad made from 30-06, and I have purged those as I find them, but I guess it's a common practice. I've even fired a few to no ill effect that I can tell. I keep rangeling up as many properly headstamped cases as possible... if I have a need later I can make them that way.
Thus is the can....View attachment 1196001View attachment 1196002View attachment 1196003
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I've got some 7.7 from .30-06 brass and it works just fine in my Arisaka. But now I have enough factory 7.7 brass to where I really don't need the other anymore and have started disposing of it.
 
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