Rebore an 8mm Mauser to.... what? - Page 2
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Thread: Rebore an 8mm Mauser to.... what?



  1. #11
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    Europeans have 9x57 and 9.3x57 cartridges in common use. The rebore would be the only change. Norma, RWS, and Hirtenberger make new brass if you want the headstamp, but American 8x57 can be easily necked up. The chamber remains the same, only the neck, throat, bore, and groove is changed. Magazine and follower stay the same, a big plus.

    edit: I just checked, Redding sells die sets in 9x57 and 9.3x57 off the shelf.
    Last edited by rob42049; 03-26-2020 at 10:17 AM.
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  2. #12
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    A .35 Whelen re-bore would be really cool. An iconic cartridge in an iconic action. Should be pretty easy, as you wouldn't have to open up the bolt face, and the dimensions should work everywhere else too. Brass and bullets are fairly common.

    If you went with a re-barrel, well I'd still probably go Whelen... But also the 7x57 is still popular enough that brass isn't too tough, and there are all kinds of bullets available at reasonable price. Also a great classic cartridge.
    Profanity is a poor substitute for education and applied logic.

  3. #13
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    I have re barreled a bunch of '98s into .308 which makes a perfect all around rifle. Any 30-06 class cartridge will work, though the '98s I have worked on may be a little short for the longer loaded shells. A couple of the .35 Whalen's worked out well and an older hunting partner still shoots his elk with one after 30 years and loves it. The 8X57 is a great performing cartridge also, though bullet selection is not wide like the .30s.

    Good barrels can cost a lot, but a Douglas Premium still is shooting way under MOA.

    Let us know what you decide to do.

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  5. #14
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    Another vote for 35 Whelen.
    M1Riflenut, rx7dryver and Sambane like this.
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  6. #15
    Sidewinder
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    Figured the action length would be long enough for a Whelen, but another couple options that might work are the .338 Federal, or the .358 Winchester. Always figured that the bullets were too hard for the .338, if you wanted good mid weight loads, but I could be wrong. Seems to me that the .358 is a bit under-loaded, so there might be some more performance potential there also.
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  7. #16
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    Well, great replies from all and thank you very much. I am interested in several calibers. If re-barreled, a 6.5 would be real nice. If re-bored, probably 35 whelen or 338-06. One thing I need to figure out are sights. Currently it has a peep sight fit to the receiver and the stock is cut around that. The front sight is a ramped sleeve. If I re-barrel I would need to have a front sight mounted on the new barrel, or remove the rear and get it drilled for a scope mount. When figuring that into the mix, plus the cost of a scope, it adds up, and if I remove the rear sight I would have a stock with an ugly cutout where the sight used to be. I was thinking of the re-bore so I could just keep the current sight setup and not have to invest in an alternative. I'll probably give JES a call and see if it's something he would do first. The barrel has been slimmed down so I will give him those dimensions.
    Posting a few quick pics below. I have a huge $150 investment into this already.

    20200326_183944.jpg
    20200326_184042.jpg
    20200326_184052.jpg
    20200326_184108.jpg

  8. #17
    Sidewinder
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    Quote Originally Posted by M1Riflenut View Post
    Well, great replies from all and thank you very much. I am interested in several calibers. If re-barreled, a 6.5 would be real nice. If re-bored, probably 35 whelen or 338-06. One thing I need to figure out are sights. Currently it has a peep sight fit to the receiver and the stock is cut around that. The front sight is a ramped sleeve. If I re-barrel I would need to have a front sight mounted on the new barrel, or remove the rear and get it drilled for a scope mount. When figuring that into the mix, plus the cost of a scope, it adds up, and if I remove the rear sight I would have a stock with an ugly cutout where the sight used to be. I was thinking of the re-bore so I could just keep the current sight setup and not have to invest in an alternative. I'll probably give JES a call and see if it's something he would do first. The barrel has been slimmed down so I will give him those dimensions.
    Posting a few quick pics below. I have a huge $150 investment into this already.

    20200326_183944.jpg
    20200326_184042.jpg
    20200326_184052.jpg
    20200326_184108.jpg
    A 6.5x55 is one of my favorites. Didn't think of that right away, but it would be perfect! What a score! That rifle is beautiful; I would have got smoke from drawing my wallet so fast!
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  9. #18
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    35 whelen for sure.
    M1Riflenut and Sambane like this.

  10. #19
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    " I have a huge $150 investment into this already. "

    Any time you want your investment back let me know! LOL
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  11. #20
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    Word of caution, if you are going to re-bore to 35 Whelen, be sure that you have a full length 98 action, and not an intermediate length like a Yugo 98 action. I currently have one of the early Zastava sporter imports in 8x57 Mauser. Much to my disappointment, the twist rate is not the traditional 1:9.5, but an odd 1:11" twist rate which means it will not shoot the longer heavier bullets traditionally associated with the 8x57. I am limited to 150gr and lighter. My only option to fit within my action length is 9x57 or 9.3x57. Anything 30/06 length won't fit without work... more work than I am willing to undertake. I am going to rebarrel it eventually to 358 win.


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