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Posted: 5/9/2008 11:02:57 AM EDT
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I just purchased a the G3 clone from a member here that is an IGF built on a JLD receiver. It is a gorgeous rifle. Got some silver bear 308 ammo. I researched it and everyone seemed to say that they had no issues firing them in their FAL or PTR etc etc. I had major issues at the range today with the new rifle. This is what would happen. The charging handle would be locked back, and i would insert the magazine and then release the handle and it would slam forward to load the first round. It would fire the first round without any problem. It would also cycle and load the next round, however when i would pull the trigger for the 2nd shot, it would sound like the firing pin would strike but no discharge. I would have to take the magazine out, take out the live round that was in the chamber and repeat the process. I did the above 10 times with each magazine and the same result. I could never fire two shots in a row. I never had a problem firing off the first round and it did cycle but when the new round was in the chamber, it would not fire. Those subsequent rounds that i had to unload from the chamber did have a small dent on the primer. I am trying to figure out why it can fire the first round after being loaded from the charging handle, but not being able to shoot the second round? It almost seems like after the first shot, the firing pin moves back or does not strike hard enough to discharge the 2nd round. I am confused. Any inputs would be highly appreciated. |
| Sound like the bolt is not fully in battery when you are trying to fire the second round. Does it have a JLD barrel? I think that it was the first run of the JLD guns had very tight chambers and did like to shoot some surplus ammo and some steel case stuff. Try some factory brass 308 rounds and see that works better. |
The gun uses a shortened FMP barrel. It was built by IGF. The only ammo that I ever ran through it was surplus South African brass. I only put maybe 10-12 rounds through the gun, but it never hiccuped.  Any help guys? Alpha is a friend of mine, and I want my old baby to run 100% for him...  |
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Its interesting note that i also was doing chrono while i was shooting these Barnaul rounds. Here is what i got out of five shots: 2344, 2299, 2324, 2304, 2345 This is my first 7.62Nato/308 rifle so i am not an expert but those numbers seem to be way slow for a 308. I was under the impression that it should be in the ~2700fps range. I thought that if the round is underpowered that it would not cycle, but that is not the case in this scenario. It does eject the spent shell and load the next round but just does not fire. |
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UPDATE: Well i purchased some brass ammo and went to the range today. Yesterday i took the gun apart and cleaned/lubed the bolt head, locking piece, firing pin, etc etc. Did not clean the flutes. Today i went to the range and although was better than original, really not much different. As you guys remember initially it would fire after the 1st round being loaded with the charging handle and not firing the 2nd shot, today it would fire the first round and 2nd round but would do the same thing with the 3rd round. On one occasion, it did fire three rounds in a row and hung up on the 4th one. Whether this small improvement is from cleaning or change of ammo i am not sure. The locking piece is a standard G3 locking piece and not a #18. My rifle has been shortened to a 12" barrel with a 4" flash hider. Do you guys think that not having a #18 locking piece is the problem? I took some pictures of the spent shells and also one of the rounds that did not go off. Whats interesting is that even the round that did not go off has flute marks??? Is that normal? Also do the spent shells usually look this dirty with the flute marks? This is a bit frustrating so i appreciate all inputs. http://i108.photobucket.com/albums/n35/ssoleymani/P1000756.jpg http://i108.photobucket.com/albums/n35/ssoleymani/P1000754.jpg http://i108.photobucket.com/albums/n35/ssoleymani/P1000752.jpg |
Well checked the bolt gap today with feeler gauge and with no round in the chamber, the gap is 0.024" and with a round in the chamber loaded with the charging handle slapped forward, the gap is 0.028". I think there is definitely a head space issue. I am sending the rifle to Jayson at IGF to look at. |
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That was my first guess, that the headspace was too short (gap too long). Would explain the marks on the shoulder of the unfired round. My PTR doesn't make those marks. Maybe some one put some +4 rollers in it, thinking that would make it better, without understanding how the headspace works on a G3. If they are std rollers, supposedly, HK did at one point make -2 and -4 rollers, but I have never seen them for sale. That would probably fix the headspace issue. The muzzle velocities seem reasonable for a 12" barrel. I get 2500 fps from my 16" barrel. 2700 fps is based on a 21" barrel. I is my understanding that a #18 locking piece affects the timing of the bolt unlocking from the trunnion, thereby improving reliability in extraction and feeding. |
any updates yet? |
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