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    lawrencewendall

    lawrencewendall

    Been There, Done That
    Oct 10, 2009
    1,746
    Before anyone chimes in to pitch this rifle, I want to try to figure out what this is chambered to first. It may end up as a mantle piece but I'm not ready to give up yet. It is a 6.5x50 mm Type 38 Arisaka. It appears to be bubba'ed but I'm not sure to what. I took a wax mold and it spec'ed out to manufacturer's specs (there is a small difference between what's online and what is in Hornady #7 edition). I loaded Prvi brass, which pretty much matched Norma specs, with the lightest load for the bullet. Here's the result. Any thoughts? The spent casing is leaning 'cause it also bulged the primer. Don't worry, the rifle was clamped down and I fired with a 30 foot piece of rope. I fired 2 rounds and both are the same. Some things that caught my eye were the re-forming of the shoulder and the lack of expansion at the base.
     

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    wilcam47

    wilcam47

    Ultimate Member
    Apr 4, 2008
    26,052
    Changed zip code
    looks like the chamber is not the same as the ammo to me..as you can see the neck is increased dramatically...ammo is smaller than chamber...not good/dangerous if you have the wrong ammo...IMO
     
    bulletbill

    bulletbill

    Agent provocateur
    Dec 31, 2008
    2,908
    SW FL
    lawrencewendall said:
    Before anyone chimes in to pitch this rifle, I want to try to figure out what this is chambered to first. It may end up as a mantle piece but I'm not ready to give up yet. It is a 6.5x50 mm Type 38 Arisaka. It appears to be bubba'ed but I'm not sure to what. I took a wax mold and it spec'ed out to manufacturer's specs (there is a small difference between what's online and what is in Hornady #7 edition). I loaded Prvi brass, which pretty much matched Norma specs, with the lightest load for the bullet. Here's the result. Any thoughts? The spent casing is leaning 'cause it also bulged the primer. Don't worry, the rifle was clamped down and I fired with a 30 foot piece of rope. I fired 2 rounds and both are the same. Some things that caught my eye were the re-forming of the shoulder and the lack of expansion at the base.
    Click to expand...

    The webbing's not going to expand it's a bit thick in that area.

    My guess;
    6.5x55-SE-scheme.svg


    300px-6.5_x_55mm.JPG


    Dollars to donuts it's been rechambered
     
    Threeband

    Threeband

    The M1 Does My Talking
    MDS Supporter
    Dec 30, 2006
    25,291
    Carroll County
    Threeband said:
    Long ago I bought an 03-A3 at the Dallas gun show which Bubba had tried to re-chamber to .308 Norma Magnum, near as the gunsmith could tell. The tip off was a .30-06 round would just fall into the chamber, and because the bolt face had been opened way up, of course it wouldn't extract. I ended up having it rebarreled and got a new bolt body.
    Click to expand...

    You never know what Bubba may have done. In my case, the gunsmith wasn't sure either. He said it was closest to .308 Norma Magnum, but wasn't really right, and was very roughly done.

    Bubba has to practice on something to develop his astonishing skills.
     
    bulletbill

    bulletbill

    Agent provocateur
    Dec 31, 2008
    2,908
    SW FL
    wilcam47 said:
    I think I am correct! Almost the same thing!
    http://www.milsurps.com/showthread.php?t=29623
    Click to expand...

    Looks like it.

    Conversion of war-souvenir Japanese Arisaka rifles

    Japanese Type 38 Arisaka rifles brought to the United States as wartime souvenirs were sometimes converted by rechambering to utilize more readily available .257 Roberts cartridge cases because commercially produced 6.5x50mm Arisaka cartridges were scarce prior to distribution by Norma Projektilfabrik A/S. The neck of the Roberts case would be slightly enlarged to accept handloaded 6.5mm bullets. The modified Roberts cases are sometimes known as 6.5x.257 Roberts, although the case headstamp may still indicate .257 Roberts.[5] Neither unmodified .257 Roberts ammunition nor the original 6.5x50mm Arisaka ammunition are suitable for firing in rechambered Arisaka rifles.[6]
     
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