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Help with Jap Arisaka (Patreon)

Published:
2024-09-13 21:24:50
Edited:
2024-09-15 01:09:45
Imported:
2024-09
Tags:

Content

This cool super collectible Arisaka Type 44 carbine is the desired Chrysanthemum receiver version. Most were ground off after the war. This was still has it though missing the bayonet. I( got it in trade about 8 years ago.

I have been wanting to review it for some time. The problem is the chambering of this gun, it's not Jap 6.5x50mm and definitely not 7.7x58mm. Someone has re-bored this gun to something else it would seem. I have fired the 6.5×50mmSR in it initially thinking it was a std caliber; cases bulged bad b. does not match that round.

I did a wax casting of the chamber and the dimensions measured off of that casting are shown. The bore is 6.5 mm. I would like to fire it for the review but unwise with the 6.5mm. Photo shows the 6.5×50mmSR purchased to fire in the gun; you can see it's not even close to the chamber casting.

See if you can find what cartridge this gun fires, thanks, UPDATED CARTRIDGE DIMENSIONS

Update: thanks for all the input. I think the best guess so far is 6.5x257 Roberts. If you have 10 rds of that lmk and I will try it. I don't think I can spend the time loading or re-loading a wildcat for this gun. I will review it as is. Thanks to all.

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Comments

deciptfullrat (edited)

Comment edits

2026-09-15 18:00 Its a 22-250
2024-09-13 21:27

DudeDudeDude

Wish I could help. Looking forward to seeing it in action after TD recommended it for the second gun that everyone should buy. Lol.

AskTheRats (edited)

Comment edits

2026-09-15 18:00 Careful Nutn. You're not supposed to say "JAP" lol.
2024-09-13 21:29

DudeDudeDude

6.5x55 Swede? I could see someone rechambering to that if the bolt head is compatible.

Timothy

There’s a firearm collectible place in my town. You could give them a call and they could probably give you an insight on ammo. They specialize in German and Japanese’s ww2 firearms https://www.legacy-collectibles.com/ 610-981-6041 is their phone number.

DudeDudeDude

I do not. Always wanted a cz550 with a manlicher stock chambered for it though.

Loki

Isn't 3" case length too long for a 22-250?

Tyler Rainville

257 robert’s or 260 rem seem close but still just not quite right. time to keep searching

Caleb11b

I'll talk to my buddy and see if I can steal a cartridge if you want. Ended up helping discover his rifle was 6.5 swede a couple years back

Chris Lacher

First impression - 6.5 Weatherby? The chamber has those rounded shoulders, and it's long and fat. It may show the magnum headspace ring in the casting, not sure from the pics. On the other hand ... that would be a death wish, firing a weatherby magnum in that old action.

Joshua Mount

6.5x55 swede maybe. That was a popular caliber back then and still is a great caliber now. It's kind of a sleeper caliber.

IndianaBen

I would second this. Compare the cast to a 257 Roberts (some stores like Sportsman’s Warehouse actually often have 257 in stock, worth taking the cast to the ammo aisle and check it out)

Matthew Williams

Based on the provided dimensions the shoulder would be almost twice the length of the neck. The pictures of the casting don't appear to match that. 1.684 + 0.455 = 2.139 3 - 2.139 = 0.861 Am I missing something?

Savagemann

It was really common at the time for those to be rechambered for .257 roberts brass. I have one. 6.5x257 is what I believe it is referred to as. Not sure if that is what yours is, but you should be able to scour the internet for more info and dimensions. Here is a link to some load data, if that is indeed what you have. I will try to scour up more info for you that I have saved over the years. https://stevespages.com/264_3_120.html

Loki

It looks similar in dimensions to a 6.5 x 55mm Swedish Mauser

Tom Small

I talked to a dude that said they made trainer rifles that were only meant to fire blanks. I guess the rifling is sharp in a regular rifle and barely present in trainers.

Rob Miller

I have a 6.5 x 55 die set and 50 new Hornaday brass. Multiple projectile options in .264. (Because of creedmore) Let me know if I can help. I don’t “need” any of it-because I have not bought a rifle yet. I just wanted to be prepared for one!

Rob Miller

Missed this. Ignore my comment above. 3” is hella long

JFire

I cannot wait to hear Tactical Doodle’s over exaggerating pronunciation

Claude Conkrite Jr

Looking forward to this review. I had my eye on an Arisaka Type 99 takedown w/ Chrysanthemum, when I worked at Martin B. Retting in LA, Comifornia. I didn't have C&R licence then like I do now, but cool rifle.

Rob Miller

I found a cool write up about this chambering in my 1974 Speer reloading manual tonight. Has load data for it as well.

Rob Miller

How sure are you about the 3” case length and the .264 projectile diameter? I paged thru some of my old manuals and did not find a good match.

CJ Habiak

I discovered this fact when I was in second grade when I referred to them as such and got obliterated by a teacher haha. It’s the only thing I ever heard my grandfather call them and thought that was just normal. Now granted he made 6 beach landings against them including Okinawa 😬 I had no clue what was happening except that I thought I was getting yelled at for no reason and to this day I don’t understand why that’s offensive. If I get merked by the Chinese while fighting with them he’s gonna loose his shit in the great beyond lol

Chase Ferguson

Also remember there is 257 AI you take a Roberts and fire form them to the AI chamber then reload. But I’m not near any of my manuals to look at that stuff.

Rob Miller

Saw update Look at 6.5 X 257 Roberts

Rob Miller

2.233 case length .298 at case end .263 projectile

Rob Miller

I took 2 pics of my 1974 reloading manual if u need but prob online.

Savagemann

I think I have some fired brass at home. I can check it when I get home

Carl Bailey

I didn't know they made them in anything other than 6.5 Jap. One note of interest, if it isn't setup with a bayonet it is likely a navy gun.

Matthew Williams

I agree that the Robert's is likely because of its popularity. Another possibility I found is the .256 Newton which matches the neck length and shoulder diameter better. It's a touch longer on the base and case overall measurements but this extra length could be the engagement area from the bolt. https://loaddata.com/Cartridge/256-Newton-Data/3033

TechNeck

looks like a 7x57 mauser.. almost bang on, could be the 7x57 IS version (a civilian version) with a slightly larger diameter projectile. The only thing out is the case length to shoulder, but your chamber just might have been cut short for head space by 20 thou (or play in the bolt with doing a resin casting instead of the pressure from a good lock up on a case pushing the bolt head back slightly. https://loaddata.com/Cartridge/7mm-Mauser-7x57mm-Mauser-Barnes-Reloading-Manual-4/4546

DudeDudeDude

The bore is not 7mm so it is not a 7 mauser. But, it could be a wildcat based off of it that uses a 6.5 bore. I think it is based off of either the 257 roberts or the 7x57 mauser. The 7 mauser is the parent case for the 257 roberts. There seems to be chatter online about converting these to 6.5x257 roberts arisaka but I also got hits saying it is a 7 mauser wildcat. I guess both can be true because the 7 mauser is the parent of the 257. Either way it is unfortunate as Nutn was wanting to shoot this thing. Redding has made dies. Maybe an inquiry to them or say Sierra bullets may be fruitful. Guys used to play with these but most of them are not around anymore. https://www.grafs.com/retail/catalog/product/productId/15694

TechNeck

7x 57 mouser has a nominal of .285 projectile... its a Europe thing.. the 7x57 IS has a .286-.287 projectile Nutns barrel may just be a little burnt at the throat, but if you compare the image i linked and his wax cast he pretty much on. its kinda like a .303 is a .310-.311 and a 7.62x 39 russia round is actually .787 this is likely a poorly cut 7x57 Mauser re-chamber which makes sense for a civilian in the US without steady access to jap ammo but a common round after ww2 for US personal

scott pochini

I would probably reach out to C&Arsenal, or Mark Novak. Both of them are highly knowledgeable on vintage guns and caliber.

snuggles

Is it possible it was turned into 6.5x55 sweedish? Looks like similar size based on measurements (Just a wild guess).

Corbin McNeal

I know you said it's 6.5mm but I've seen comments of it potentially being a Mauser conversion. If needed I have some 7.65x53 if you decide that's what it is or if you want to try it.

Savagemann

You can make 6.5x257 roberts brass using 7mm mauser, but going up from .257 roberts brass is much easier

HappyFrancisMacomber

I’m just enjoying all the knowledge drops from TNPrs. Y’all are the coolest group, glad to be a part of it!

Firearms Fuel&Fabrication

I am gonna second 6.5x55 aka 6.5 Swiss. It would be worth looking into. Someone may have done it way back to hunt with it pr something using the more available 6.5 swiss

BadgerTails

TIMELY: my neighbor has one to sell for $100 as he doesn't know what it is, I initially said it's an Arisaka and that rang a bell in his memories of what his Dad said it was.....has some REALLY interesting markings...

PC

You mentioned bulged cases, have you taken measurements from the fired cases and post pics the reloading experts here should be able to help. I'm no expert but the Robert's or swede suggestions sound about right.

steve garrett

PO ackley was is a famous gunsmith from the salt lake area. he invented the ackley improved chambers. He did some action torture testing with over pressure loads. He said the arisaka action was the strongest he tested. The 1917 enfield was second. The critical dimension is the base to shoulder junction. remember in order to fit the case needs to be smaller than the chamber. a sized 257 case may not fit. it might depend on how much sizing the x57 die does to the case if it fits or not.