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Author Topic: Mauser 98 ejection problem  (Read 836 times)

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Offline chazgin

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Mauser 98 ejection problem
« on: October 20, 2003, 05:34:09 PM »
I rescued an Arg 1909 from my friend who hated it. Turned out that this was an Interarms rework of a DWM 09. They had rechambered the original barrel to 30-06. This rifle didn't shoot very well (DUH!) and further inspection revealed a badly pitted bore. Anyway, ripped off the trashed barrel and found an original 09 barrel. Chopped to 24" and recrowned. (I have 3 other Argies in as issued condition so plenty of dies and bullets). To make a long story short the rifle shoots very accurately. There is one problem though, when you extract a fired cartridge as you pull the bolt back the fired case slips out from under the extractor. I've observed this carefully and the fired cartridge falls down towards the magazine as its extracted. I'm assuming that Interams modified the ramp or the magazine box or both to feed the longer 30-06 round. Is there any way I can fix this? I can live with it but would like to fix it if I can. Kuhnhausen's book does not address anything like this.
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Offline gunnut69

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Mauser 98 ejection problem
« Reply #1 on: October 20, 2003, 08:12:00 PM »
The mauser extractor should keep the case secure against the boltface as it's pull to the rear.  If it doesn't it has either been sprung or someone ground on the hook to try and make it jump over the rim of a cartridge.  If the latter a new extractor may be in order, if the former, simply dismount the extractor and bend the tail(from the extractor collar to the rear rub button) to force the rub button to press more firmly against the bolt body.  This will only provide a bit of tension, enough if the extractor was damaged by improper removal.  If the hook has been ground a new extractor is in order.
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The 2nd amendment to the constitution of the United States of America-
"A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

Offline Mikey

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Mauser extractor
« Reply #2 on: October 21, 2003, 06:06:20 AM »
chazgin:  the gunnut is right.  I think when they rebarrelled your Argie to a rimless 06 they may have reworked the extractor to handle the rimless 06 case (I think the 7.65 Argentine round is rimmed????????).  Anywho, you can either bend the extractor of find a new one.  HTH.  Mikey.
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Offline chazgin

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7.65 is not rimmed, same head size as 30-06 / 308
« Reply #3 on: October 21, 2003, 03:20:03 PM »
I haven't looked at the extractor end but will compare it with 98's I have. Will try your suggestions on bending slightly and see if that helps. thanks for the help guys. I have chrono'd 150 gr Hornady spitzers at 2700 avg using 47.5 grs of IMR4895. No pressure signs, as a matter of fact the velocity was low around 4550 and the case smudged arounf the body until I switched to mag primers and used a Lee factory crimper. I was trying to seat the bullets out but still can't reach the lands with 1/8" of bullet in the neck! Probably because of that 210gr throat the military barrel has. Anyway this rifle is now shooting an honest .75" group at 100 yds thru only a 3X9 scope. I should mount a 24X to see what happens but I'm very happy so far.
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Offline chazgin

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CORRECTION! Should be 2550 fps not 4550 fps !
« Reply #4 on: October 21, 2003, 03:28:03 PM »
nt
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Offline gunnut69

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Mauser 98 ejection problem
« Reply #5 on: October 21, 2003, 07:38:02 PM »
I haven't access to my manuals at the moment but I don't believe the Argentine round is rimmed but I do believe it used a .311(or .313) diameter bullet.   Perhaps they installed a 30-06 barrel from another mauser variant.  Several SouthAmerican countries produced 30-06 mausers after WWII and barrels were once readily available.  The 308 diameter bullets of the standard 30-06 would be a loose fit indeed in the Argentine bore.  That could explain the seating depth problems as well as the lowered velocities...  Some people ground the edges of the extractor in the belief that they could force it to 'jump' over the rim of a single loaded cartridge.  All that was needed was pressure applied to the extractor between it's collar and the rear of the leaf.  This will allow single loading with no modifications at all.  If the length of the extractor hook has been reduced very much it will require replacement,..,
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gunnut69--
The 2nd amendment to the constitution of the United States of America-
"A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

Offline chazgin

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The rifle was original
« Reply #6 on: October 22, 2003, 06:40:24 PM »
Gunnut

Interarms rechambered the original barrel to 30-06, it still had matching serial numbers. I took this barrel off and replaced it with another original 09 barrel. This barrel I cut to 24" and recrowned. I'm sure the throat was cut by DWM for the 210 gr roundnose bullet. I have a chamber cast that shows the length. I could make brass a little longer in the neck but then I couldn't use the handy dandy form and trim die. No biggy it still shoots sweet. This weekend I will take a good look at the extractor and compare it to the other originals I have. I got a lead on another load using Varget that will reach 2800 fps with 150's that I will try also. By the way this barrel slugs right at .311. There is no appreciable accuracy difference between Sierra .311 and .Hornady 312 bullets.
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