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Gew88 Range Report!

Discussion in 'Rifle Country' started by Joshua M. Smith, Aug 26, 2011.

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  1. Joshua M. Smith

    Joshua M. Smith Member

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    Hello,

    I shot all day, then shot for groups tonight. Interestingly enough, when I let my lady fire, she had a misfire with a Federal primer. First one I've experienced. Figured it was maybe missing the anvil, but nope, it was there. Plenty of striking power, and I did multiple strikes, anyway. Ended up well-dented, but never did fire. No other problems.

    Now, I was going to have a very nice target to show you. I shot prone at only 60 yards and they grouped all into 1" with one flier taking it to 1.5". Unfortunately, though, they were a foot high and not on the target.

    I ordered a Mauser sight blank from Brownell's which will either work or will be modified to work while this one is just put up.

    I did notice, though, that the primers are backing out a bit. Not sure what's causing this. The headspace gauge returned OK, but I put a field gauge on order from Brownell's with the sight, just in case.

    I honestly think the load might be too light. The cases are all fireformed and I am seating the 200grn bullet to a depth of 3" exactly. Charge is 40.5 grains of Varget.

    If the rifle's throat is relieved as I suspect it might be, then this would make sense. They back out about like when one fires a primer only with no powder.

    Now, I'll tell you why I think the throat and lead may be relieved: I have this method, which some find cool and others think is really stupid, but I've yet to have any problems -- I just fire a bullet into the lead with a primer. I do not use powder. I then knock it out from the muzzle and measure it.

    The 0.318" bullet I did this with shows very light rifling marks. I mean, I can't even feel them unless I use my thumbnail.

    So, not enough pressure? Bump it up to 41grns and see what happens?

    Thoughts?

    Thanks!

    Josh
     
  2. Vaarok

    Vaarok Member

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    Did you have the battle sight flipped up? And it should shoot a foot high, it's meant to be aimed at the beltbuckle of an enemy soldier, to simplify battle-sight settings.
     
  3. Joshua M. Smith

    Joshua M. Smith Member

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    Hello,

    I had the sight flipped down, so the 300 meter battle sight was indeed up.

    Josh
     
  4. Lone Star

    Lone Star Member

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    Slug your barrel. It may have been replaced with a .323 "S" bore one.
     
  5. Joshua M. Smith

    Joshua M. Smith Member

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    Hello,

    The barrel slugs to 0.310 x 0.318, but I suspect the throat has been opened up so that it has a 0.323 chamber and throat. I believe this is what the "S" means.

    Josh
     
  6. Joshua M. Smith

    Joshua M. Smith Member

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    Hello,

    To further clarify, here's a few pics. I bumped the charge up 1/2 grain and the backed out primers are much better. I'm betting if I bump it up again, they'll go away entirely.

    firedvsunfired.jpg

    primer.jpg

    casemouth.jpg

    I'm finding it fascinating that the cases actually seem to shrink compared to unfired but sized cases, and that the neck opens up as much as it does.

    Comments?

    Thanks,

    Josh

    P.S. Thinking about it further, I've not had any brass cut using the Lee sizer. I figured it was just the mild loads... but could the brass actually be shrinking lengthwise while fattening up around the case mouth and maybe the middle? Thanks, J.S.
     
  7. retDAC

    retDAC Member

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    Correct. The Germans modified many of these to accomodate the new ammo w/.323 inch bullets, relieving chamber neck and throat, then marking them with the "S" you found. The larger chamber neck is causing your light loads w/.318" bullets to "shrink" in the necks.

    Many have stated the full power .323" ammo is unsafe to fire in these rifles with the relieved chamber neck and throat.

    Have often wondered about this "wisdom" as I find it hard to believe the Germans didn't test this thoroughly before approving the mod.

    Conventional American .323" hunting loads from RemingFedchester (or is it WinFedington?) are loaded down for mainly these older .318" barrels.
     
    Last edited: Aug 28, 2011
  8. Joshua M. Smith

    Joshua M. Smith Member

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    Hello,

    I reformed some Winchester .30-06 to 7,9x57J.

    I am having no issues with primers backing out, nor am I getting gas blow-by.

    Half the Remingtons are annealed while the other half are not. None of the Winchester brass are.

    So, looks like the Remmy brass is bad. Last time I use that stuff! Is it me or has Remington been going downhill since the mid-'90s?

    Thanks for all the help,

    Josh
     
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