Maylaisian 7.62 NATO case seperation in MG42

Anything MG42 related.
Waffentag
Oberleutnant
Oberleutnant
Posts: 106
Joined: Fri Jul 03, 2015 6:49 am
Anti-spam: Mg42

Re: Maylaisian 7.62 NATO case seperation in MG42

Postby Waffentag » Sat Jun 09, 2018 8:49 pm

Thanks Frank for the detailed reply.

The first thing that I did after I got the gun was to have Bob rebuild my recuperator with his new springs.

At first, the Malaysian was tearing off in the middle. Last time out, Some of the Malaysian and 2011 Lake City tore off near the base the rest tore off in the middle.

So, if I do have imperfections in the chamber, what can I do. 3 of the barrels are marked with a "C" and appear to be chrome lined.,

Thanks Pat

amafrank
Major
Major
Posts: 363
Joined: Mon May 12, 2008 6:51 pm
Location: USA

Re: Maylaisian 7.62 NATO case seperation in MG42

Postby amafrank » Sun Jun 10, 2018 6:22 pm

Most of the 308 barrels I've seen came from Austria and were for the MG74. They are license built versions of the MG3 with a few mods like the finned barrel bearing sleeve and the fancy trigger housing with single shot capability.
In any case the barrels may or may not be chrome lined and won't likely have any issues with rough chambers. They were all built during peacetime....or relative peace time as in cold war. Quality is excellent too.

I guess the only thing you can really do is make a chamber cast with cerrosafe and see whether there are any problems with the chamber. You can measure the diameters at various points to insure the taper is correct and there aren't any swelled areas.

If the chambers are fine and your headspace is within spec than likely the ammo is your problem. I've heard of some problems in the Lake City 50 cal brass but I haven't shot much 308 for a while so I don't pay any attention. Check some of the ammo boards and reloading sites to see if anyone knows of issues with the 308 brass. It is possible.

Find ammo the gun likes and shoot it. Some guns are picky and others not so much. I've got a couple rifles that will shoot about anything out there and a couple others that are one brand guns. It happens.

Last thing.....when you have cases separate are you getting gas blowback into the receiver? If you are is it popping the topcover or blowing crap out the ejection port? If not than my guess is you have a brass issue more than anything else. Some doesn't stretch well.

Hope that helps

Frank

SturmHead
Hauptgefreiter
Hauptgefreiter
Posts: 14
Joined: Tue Apr 15, 2014 4:06 pm
Anti-spam: Mg42

Re: Maylaisian 7.62 NATO case seperation in MG42

Postby SturmHead » Mon Jun 25, 2018 12:37 pm

Myself and another member here got together yesterday to test the Maylaisian ammo and some other ammo. We both ran the Maylaisian ammo through our MG42s with no issues. I used 4 different barrels including the one that I had had issues with. We both concluded that the ammo was OK to use, but keep a ruptured case extractor handy. All the barrels I used had the head space checked with the bolt used, and were OK.

Waffentag
Oberleutnant
Oberleutnant
Posts: 106
Joined: Fri Jul 03, 2015 6:49 am
Anti-spam: Mg42

Re: Maylaisian 7.62 NATO case seperation in MG42

Postby Waffentag » Wed Jun 27, 2018 8:12 am

Thanks for the report on the Malaysian. If you don't have ammo problems, it could be a bad Lot or two of my barrels?

I have five 7.62 Barrels, two seem to be the problem. I inspected them, Gave them a good cleaning, tested headspace again. I even installed and tried a MG3 BW HK Marked Cam Piece, ("RTG Description "MG3 TRUNNION COMPLETE")

I just got a few new parts from RTG, and cleaned them again, Will give those two barrels another try, I noticed that the MG3 Bushing was a bit different?

I doubt any of these parts will make a difference?
1 MG3 BARREL BUSHING (MGG-0901)
1 MG RECOIL SPRING NEW (MGG-1824) NEW in the WRAP
1 MG3 MG42 BUFFER NEW IN WRAP (MGG-1774)

SturmHead
Hauptgefreiter
Hauptgefreiter
Posts: 14
Joined: Tue Apr 15, 2014 4:06 pm
Anti-spam: Mg42

Re: Maylaisian 7.62 NATO case seperation in MG42

Postby SturmHead » Wed Jun 27, 2018 11:16 am

As long as the barrels and bolts head space are in specification then I think any issue with Maylaisian ammo is the ammo.
Years ago I bought a case of Maylasian ammo for cheap, at the KCR MG shoot. I was talking to a fellow MG 42 shooter, and without any mention of Maylaisian ammo, he told me not to shoot it in the MG42, that it would blow the gun up. Another friend of mine that I trust he knows his stuff, said if it's not NATO ammo (circle and cross on the head stamp) then you can't guarantee it is NATO spec. I thought about what these two gentlemen said and thought "cheap ammo with a bad reputation in an expensive gun, do I want to risk it". I gave that case of ammo away.
Now I know there are some non NATO countries that make fine ammo that will run very good through the MG42; Brazilian military 7.62x51 comes to mind, but Maylaisian is not at the top of my list.
I feel pretty good about the lot of Maylaisiasn that I have, which is almost gone, and wont blow the 42 up, but case separations are a possibility.
I MIGHT buy some more, but 10 to 20 cents a round more buys a lot of peace of mind.

Waffentag
Oberleutnant
Oberleutnant
Posts: 106
Joined: Fri Jul 03, 2015 6:49 am
Anti-spam: Mg42

Re: Maylaisian 7.62 NATO case seperation in MG42

Postby Waffentag » Wed Jun 27, 2018 2:29 pm

Roger that, I had LC separate as well. The Malaysian, seemed to separate in the middle and the Lake City toward the base?

So, I suspect that even thought the bolt barrel combinations head space good, two of the barrels have something going on. I followed Franks instructions and gave the chambers a super cleaning to get rid of any brass build up.

I will test with LC first, then if that works in those two barrels, then try the Malaysian<

The last thing to change is the Recuperator, It is the Original German WW2 that had new springs put in by Bob Naess, I could always have him re-spring a spare from a Yugo kit and try that?


  • Similar Topics
    Replies
    Views
    Last post

Return to “MG42 General Discussion”



Who is online

Users browsing this forum: No registered users and 2 guests