[post-apocalyptic]

Huh.. I'd never heard of this deliberate case expansion by Saigas before. Can anyone confirm one way or the other whether or not Arsenal's SGL20 model includes this undesirable "feature"? As others have mentioned, this has got to reduce muzzle velocity...

This post has been edited by post-apocalyptic: 15 March 2009 - 10:02 PM

[Airtractorfan]

Does anyone experience the same amount of case neck swelling on the 7.62x39 Steel cases from Wolf or Monarch?
I do not plan to shoot brass in my rifle or only on an infrequent basis.Thanks.

[gothchick]

5.56 doesn't do the neck swelling thing, but it does get the same ding in the side of the spent case.

[post-apocalyptic]

gothchick, on Apr 13 2009, 02:29 PM, said:

5.56 doesn't do the neck swelling thing, but it does get the same ding in the side of the spent case.

That makes sense, since the Russian military doesn't use 5.56 NATO, any spent casings found by Russian police are obviously not from Russian military weapons, so no "step" is necessary.

I've since answered my own question from a couple posts above: Arsenal SGL20's do not have this Russian gun control "feature" either. No "steps" in my case necks. It wouldn't have been a big deal either way, but I have to admit that I'm glad my rifle doesn't deform casings like that, (she just dents the shit out of the side of em ).

This post has been edited by post-apocalyptic: 13 April 2009 - 03:45 PM

[555JM]

Finally got to the range today with my two bone stock x39 Saigas (a rifle and a carbine) and sighted them in with Wolf 122Gr. FMJ. Both shot surprisingly well.

Things got interesting when I tried shooting some reloads I'd put together 10 years ago for my now-departed Mini-30. They shot very well also, a little better than the Wolf except for a flyer or two. Then I went looking for the brass (3x reloaded IMI).

Found circumferential case neck cracks in about half of the cases. The cracks were just above the case shoulder in the middle of the bulged area caused by the gun control "feature". The carbine was fired after the rifle and on one case fired in the carbine, the upper part of the neck was missing. That's what got my attention. On checking the other cases fired in the carbine, I found several others that were cracked in the same location. Going back to the cases fired earlier in the rifle, I found cracks on about a third of them, but no neck separations.

There wasn't any gas leakage from the action, nor was there any sign of it on the sides of the cases. Both loads were put together with starting powder charges and felt light when shot. One used a light 110Gr. bullet (shot in rifle) while the other used a heavy 165Gr. bullet (in carbine). Cracking seemed worse with the heavy bullet, but several case necks cracked with each load. None of the Wolf steel cases I retrieved showed any sign of cracking.

So, no more reloads for the Saigas....and maybe no more brass case ammo for the Saigas. I've got a little S&B brass case stuff that I might try, but I'm not buying any more for these guns. Steel case only from now on. Guess I'll have to go find another Mini-30 if I want to shoot those reloads.

This was the only negative in my first outing with these guns. They're actually great little shooters, more accurate than I'd hoped, and neither missed a beat. It's a shame that the single issue came from an "engineered defect".

If you're shooting brass, keep an eye on the cases.
Bob

This post has been edited by 555JM: 06 May 2009 - 04:12 PM

[sh00ter]

just thought id post the bit out of the manual which mentions this :



I shoot both reloaded and factory ammo (wolf), the reloads I have done are using Lapua brass, I have reloaded these cases about 5 times each so far - the swelling is completely got rid of by a full length resize and I have had no signs yet that they may crack or anything.
I loads a couple of different types, one slightly reduced to drop under my ranges 2100fps limit and full power loads also.

interesting that you have had cracks on the slight bulge, my only thoughts are either that the chamber marking is maybe deeper on yours? (cant see them using different tooling though) or maybe your brass is a bit brittle or maybe just different - i have IMI cases in 44 mag, and they "feel" different inthe press that the 44 remingtons I have. My brass is new and only been fired in this saiga, cant really see how that may be relevant tbh...

Quote

In the UK 7.62 is expensive $60+ per 100,

I buy my wolf for Ј23 per 100, I think your being done over m8! (unless its reloadable brass of course...)

I really dont think that velocity is affected to a degree where its an issue, after all consistency of velocity spread is more important than say losing 5fps or so

just my 2c

This post has been edited by sh00ter: 06 May 2009 - 04:47 PM

[post-apocalyptic]

My SGL20 doesn't crack brass cases, (or deform em with that idiotic "gun control feature"), but regardless I won't be putting any more brass through her. She does dent the shit out of the sides upon spent case ejection and shave bits o brass off in the receiver.

Steel casings get a (smaller) side dent as well, but they're cheaper and non-reloadable anyway. So, it's steel only from here on out.

[555JM]

Thanks for the response, Sh00ter. I might have to look into annealing case necks after each resize. I seem to recall reading a procedure for doing so in one of my manuals. Something like arranging the cases in a tub of water with just the necks and shoulders above water. Then heating the exposed necks with a torch. Sounds messy.

There are still 400 unfired IMI cases here from 10 years ago. Glad I didn't order more. Lapua brass is too pricey in the States. Would rather spend the money on Wolf.
Bob

[sh00ter]

Quote

and shave bits o brass off in the receiver.

this is one area i havnt rectified yet, i get very small particles of brass that collect just under the chamber, i had attributed it to the magazine lips - as the cases have a fine scratch along the length - i was thinking of slightly polishing the underneath of the feed lips on one magazine and seeing how i go.


ive also read the same thing about annealing cases! have never done so though, will be interesting to hear from you if you do it.

[Geezer59]

I remember reading reading about a chamber insert for converting 30-06 chambers to .308 - has anyone investigated making a similar sleeve-type insert in the case neck area of a Saiga 7.62x39 chamber? Maybe heat the barrel/freeze the insert to insure retention, perhaps kissing after installation with a chamber reamer? Don't know how well that would work with a chrome plated chamber (probably not good for the reamer) - any thoughts?

[AKsarben]

Would be better to just remove the barrel and install a new barrel that does not have the 2 step chamber in it.
You would also have to make sure the headspace is right, and that would require chamber go no-go headspace gages and a good gunsmith.

[DLT]

My SGL20 also does not deform the neck of brass ammo, but like post-apocalyptic's SGL, it does dent the heck out of the sides. What's the solution to the dents again? Some kind of weather stripping?

[AKsarben]

I went to Auto Zone and bought a door guard strip. Then I cut just about 2" off and put on the dust cover where the shells flie out the most. I have reduced shell dings to 0.

[1mile50]

The dimpled receiver x39 Saiga that I just bought is thankfully without this feature. Why?

[IndyArms]

Random chance...

They say the Sun even shines on a dog's ass now and then...

I am going to guess you got either an older barrel matched to the newer rifle, or they made a few that way for a military contract, and the over run went to general production...

either way... ROCK ON! LOL

[WaffenSchmied]

Looks like an ejected Galil .223 or 5.56 casing. I always figured the Israelis did this to keep the spent shells from being collected, and reloaded by the enemy.

Didn't expect to see it on a Russian gun.

WS

[sailor]

A comment on the thread "SGL 21 being cheap" (temporarily), mentioned that they had military barrels (no step). My Saiga Sporter (purchased stock, then I converted), was purchased 2009, current production, and does not have the step. Also, it is dimpled. Don't know what any of that signifies, but seems out of the ordinary. I really didn't pay any attention to the "step" situation, until I fired some Fiocchi brass cased ammo a few days ago. The classic "ding" as I always get from ejection, but no discernable step. I have to assume that a military barrel was installed in my sporter, or the practice is spotty or discontinued - ? Pleased, in any case.
Sailor

[YouWontHearItComing]

My 12/16//09 rifle (with dimples) doesn't do this at all. I get a super-small flat spot near the top of the case and thats it. Maybe I got a military bbl/chamber. ??

I know my S/N on the trunnion looks like a mess by the H. Maybe they were going to stamp one way and went another.