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Thread: New barrel for an Arisaka 38?

  1. #1
    Boolit Master


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    New barrel for an Arisaka 38?

    I have an Arisaka ttype 38 that I got pretty cheap that was purported to be 257 Roberts, It was actually a 6.5X257 Roberts which I found out before I actually bought it and was able to low ball the offer to where I was happy about it. I got the proper dies and have shot the rifle some. It has a short barrel and so is noisy and the muzzle has been butchered and a home made front sight that is too short to be able to zero the rifle has been soldered on. I like 6.5 bore rifles. I would actually like to have this rebarreled into a 22 inch long 260 Remington and I would like to improve the trigger while I am at it. All the short chamber barrels I have seen are to fit Mausers, Is there a source for short chamber barrels that would fit an Arisaka? How would I tweak the existing trigger to make it less military?
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  2. #2
    Boolit Master pietro's Avatar
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    There's not enough demand for a barrel maker to tool up specifically for Arisaka barrels; so IMO your best bet would be to obtain a 6.5/.264" barrel blank and get it threaded for th Arisaka & chambered to .260 Rem.

    https://www.brownells.com/gunsmith-t...prod15610.aspx

    Since the other issue would be feeding, I would suggest you try to feed a .260 from the Arisaka's magazine before spend $$$ on it.

    If it feeds, you're GTG; if not, then additional gunsmithing would be needed to get it to feed.


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  3. #3
    Boolit Master


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    It has been worked on and made to feed the 7mm/257 roberts/mauser. so I am thinking that part might be no problem. I have 308 and 243 win brass I can try.
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  4. #4
    Boolit Master


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    What is the thread pitch for an arisaka? What is the thread pitch for a large ring Mauser? I see that there are short chamber barrels to fit the Mauser for less than $100 while Blanks, unchambered are about $300. The one I saw that was for a Mauser was 6.5X55 which might be close enough. And I have dies already for 6.5X55.
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  5. #5
    Boolit Grand Master Texas by God's Avatar
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    The Arisaka has a bigger barrel shank than a Mauser. Also it is a coned breech in the 38. It takes some work to rebarrel an Arisaka but I definitely would and have.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

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  7. #7
    Boolit Master
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    Believe it or not,the 38 thread is a near exact 3/4" pipe thread........and there are people who screw a bit of water pipe into these actions and use 12 ga shells .......single shot of course,but a single shot at point blank is generally all thats needed.

  8. #8
    Boolit Master Clark's Avatar
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    Click image for larger version. 

Name:	Type 99 Arisaka rebarrel drill and tap pillar bed drawing d 8-2017.jpg 
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Name:	Arisaka 257 recoil lug b1-22-2017.jpg 
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Name:	Arisaka 257 d 3-3-2017.jpg 
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Name:	257 Roberts Arisaka 3 shots 200 yards 100gr nos bal tip oct 18 2017.jpg 
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ID:	245180

    In 2017 I put a Winchester 25-06 barrel on an Arisaka and chambered for 257 Roberts. I made a recoil lug and pillars. I put a Timney trigger on [not shown]. I shot a 3 shot group at 200 yards and did not hunt with it. I made a sketch of the barrel, pillars, lug, and scope mounting.

    In 2019 I hope to get another Arisaka running well in 308.

    I see paypal auto charged me $20 and I can post pics again.

  9. #9
    Boolit Master
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    The T38 has an inch dimension.......1.040"x 14 tpi........from memory..........the T99 has a metric pitch ,as mentioned.......the barrels are not interchangeable.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check