hakim,what is wrong?

tristanium

tristanium

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i took mine at the range yesterday for the first time and experienced some strange things concerning the empty cases,heavy ripping on the rim (extractor),deformations,crooked casings,even a case split at 3/8" from the rim.
excessive headspace? uncorrect setting for the gas valve? cheap ammo?
your thoughts?
here's a couple of pics,i've shoot more than these but they are the ones i found...hope this help.
thanks,
t.
casings1.jpg
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casings2.jpg
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casings3.jpg
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i have no idea about the hakims but from my experience with semi and full auto guns Ill say you guesses are spot on
the extractor claw should have a spring under it to allow for movement, that may be stiff, try cleaning if its posible, just make sure the rip is not made by stiff ejector(im guessing the bolt will look similar to C7 rifle or C9lmg)
that and the headspace
 
It may definitely be a "pressure" thing, as the AG-42/Hakim likes to demolish cases..:(..see for advice (bottom of the page):

http://www.canadiangunnutz.com/forum/showthread.php?t=371886

That said, try different types of ammunition (if you can), as the powder, well, per "some source" ;) :

With a powder that is too slow a burn rate the bolt carrier opens violently premature and at an extremely excessive pressure. This causes the extractor to tear the rim off the cartridge case...
Click to expand...

But you probably already knew that the AG-42 and Hakim shared the same "issues".... :yingyang:
 
Turn your gas setting down as low at it'll go and test it.. Mine did that until I damped it completely down. At that point it got fussy, but there will be a sweet spot somewhere. It still gave a nice little dimple on the rim, but not nearly as much.

Also, if you're reloading, maybe try a faster powder?

Finally, I took a chunk of rubber and bored a hole in it, then sliced it to fit over the stripper clip guide arm. Brass hits the rubber instead of the arm and doesn't get all dented to hell.
 
so,bolt completely srippped and cleaned,there wasn't much dirt enough to cause the extractor to jam.
second step is to set correctly the gas valve,i did that on a fal,set it to lower adjustment then increase till good action cycling.
about reloading,i'm not ready to reload this caliber for now.i still have plenty of surplus ammo left.
t.
 
I think you may have two issues, first too much pressure in the gas systems makes the case hammer the ejector too hard, as per Wally already stated.

Seeing the bulge at the base of the case, you may also have a high pressure or a headspace problem, too. But it also may be caused by the bolt opening too fast while a lot of pressure still remains in the barrel. So, adjust your gas system and check your cases again.
In WWII, there was 7.92mm ammo made in the US and UK for the BESA machine guns, and these were hotter than the standard SAAMI (very low) pressure. I don't remember if the USA-made ammo had the WRA stamp,but the fact it's written 7.92mm on it instead of 8mm makes me wonder.
Anyways, try another make, but in the meantime if you still have a bulge, it may be a good idea to check the case headspace and have your gun checked for headspace issues too.

If you need CIP / SAAMI specs for cases / chamber, just send me a p/m.
 
I had a Hakim and the dented cases are normal.
The ammunition you should be using is the German Ss ball ammunition, with the 198 gr loading at approximately 2450 feet per second. Adjusting your gas regulator will also help. The Winchester 154 grain ammunition is more like the German S munition at about 2800 ft/sec., and looks its to hot at your present gas setting.
The Swedish AG 42B, had a rubber roller added to protect the cases during ejection.
My K-31 dents cases on the case mouth like that, when they hit the ground.
 
I forgot to mention that most of the early semiautomatic rifles needed balancing.
Put the regulator at the middle setting. Fire a round, and if it ejects, turn down the regulator to the next lower setting and fire another round. Keep going down until it will not eject, then go back to the setting it last ejected at.
Going up in settings, use the same principal.
 
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Ammo

I agree with gas regulator, set it down. As for the Ammo, probably too hot, read about MG-42 testing at Aberdeen proving ground, they had problems with American manufactured ammo, it was boosting up the 42 rate of fire by a good 200-250 rds/min compare to German ammo, and they had a lot of spit casing too.
 
This might help with your problem.

“Use caution when firing the Ljungman and Hakim rifles as the burn rate of the powder has a dramatic effect on the operation of the rifle. There have been reported cases of catastrophic failures of both these rifles when fired with incorrect ammunition. Even the Swedish m/41 ammunition was required to be lightly oiled by Swedish troops prior to loading as the burn rate of the powder is too slow and the oiling of the cartridge body facilities extraction.
The main dynamic involves the pressure curve and the timing of the pressure curve as it relates to the location of the gas port in the barrel. While the Hakim has a gas port adjustment the Ljungman does not. As the bullet passes the gas port the gas pressure is channeled back to the bolt carrier to unlock the bolt. With a powder that is too slow a burn rate the bolt carrier opens violently premature and at an extremely excessive pressure. This causes the extractor to tear the rim off the cartridge case exposing the action to the dumping of very high pressures which typically exits the action downward into the magazine well, blowing the magazine completely out of the rifle and often destroying the magazine and stock in the process. Close attention must be paid regarding the use of correct ammunition in these two rifles.”

http://en.wikipedia.org/wiki/Ag_m/42
 
"...seems like the thrown case is almost as dangerous as the bullet itself..." A lot of milsurp semi-autos are like that. Sometimes it's about the lubing of the rifle. M1's can throw brass differently if the lubing isn't right.
bigedp51, Wikipedia is an unreliable source. Anybody with Internet access can post there. "Even the Swedish m/41 ammunition was required to be lightly oiled" This in particular is nonsense.
 
sunray said:
"...seems like the thrown case is almost as dangerous as the bullet itself..." A lot of milsurp semi-autos are like that. Sometimes it's about the lubing of the rifle. M1's can throw brass differently if the lubing isn't right.
bigedp51, Wikipedia is an unreliable source. Anybody with Internet access can post there. "Even the Swedish m/41 ammunition was required to be lightly oiled" This in particular is nonsense.
Click to expand...

Sunray

I was in a debate about keeping all oil and grease out of your chambers because of bolt thrust. A person posted the manual for the Swedish m/41 and the manual stated to lightly oil the ammunition, your statement and assumption below is incorrect.

"Even the Swedish m/41 ammunition was required to be lightly oiled" This in particular is nonsense"

The next time sunray do a little research before making incorrect assumptions and telling someone their answer is wrong. :rolleyes:

PagesfromAG-42B_Owners_Manual1.jpg
 
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