Mini-G First Range Trip - 7th round jams?

[awpk03s]

Took my Mini-G to the range for the very first time today. I fired 8 enbloc clips of HXP. Clips were CMP-3 clips. I made no changes to the Schuster plug since receiving it from Tim. The rifle was very well lubed and greased. On 3 of the 8 clips, the 7th round would jam like this:

http://i163.photobucket.com/albums/t310/mba656/guns/IMG_0504_zps99cc903e.jpg

What gives? Please give me some advise on what I can do to troubleshoot this and not keep experiencing it?

On happier note, I love shooting this gun. First 3 clips at 30 yards:

http://i163.photobucket.com/albums/t310/mba656/guns/IMG_0503_zps9f79d2a8.jpg

When I get a little more time later I will update with some more details/thoughts/pictures of the range impressions.

Thanks.

[Punch The Clown]

Nice looking gun. The 11 O'Clock jam is a pretty common one, but it can be caused by about a million different things. One thing to look out for is that the ejector does not stick out past the edge of the bolt. Too much or too little gas pressure/bolt speed is another possible. Of course the easiest thing to do is to try different en-blocs. I've had ones that didn't allow all the rounds to seat all the way back in the block. Caused a lot of difficulty inserting them and also caused jamming.

[Punch The Clown]

Here's a good shot showing you what I mean. You can see that if the ejector sticks out too far it can catch the rim of the cartridge causing the type of jam you have. This ejector is fine.

http://i369.photobucket.com/albums/oo140/Stumedic/2436863506_e312baafd3_zps9a508ea4.jpg

[awpk03s]

Thanks a lot. My ejector appears to be fine. It may be a clip issue...
Stupid me, I did not segregate the clips in question and just tossed 'em back in the range bag. I guess I'll have to vet them again when they get loaded sometime again in the future.
My empty cases were ejecting from 1:00-3:00 which I think it probably good?

[Punch The Clown]

Usually, the farther forward you throw the cases the faster the bolt speed. My BM-14 throws them at around 3 and I slowed my BM-59 down enough to reliably feed and to throw them around 5.

[timshufflin]

Sir, I would simply make sure you see if there are particular enblocs that cause this, get me a photo of your ejector at the bolt face from top to bottom. You can of course call me, I'd love to hear from you.

[awpk03s]

Thanks Tim. Here are a couple of the pictures of the ejector and bolt face:

http://i163.photobucket.com/albums/t310/mba656/guns/IMG_0509_zps4f35bf7d.jpg
http://i163.photobucket.com/albums/t310/mba656/guns/IMG_0510_zpsfd7f475a.jpg

Anything telling from these?

I'm going to break it down and make sure the follower track in the receiver and the follower arm is well greased and try it again one night this week.

Thanks!

[TommyD11730]

7 round jams huh? Well at least its compliant in NY now. Just kidding! Awesome looking gun and lots of luck shooting it.

[Punch The Clown]

Hey, is that the rifle with the NM front sight? If it is, I saw it over at Tim's. It ran like a thief.

[awpk03s]

Hey, is that the rifle with the NM front sight? If it is, I saw it over at Tim's. It ran like a thief.

Nope, not this one. It had a standard width front sight, I have since mounted a Smith tritium stripe on it. I did manage to get a 2.5" group at 100 yards, which I thought was pretty darn swell.

[awpk03s]

Okay, broke the rifle down tonight, and well greased the track in the receiver for the follower and the follower arm. The follower arm had some crusty gunk caked up where it contacted the follower, cleaned all that off before greasing it.

I also gave a little relief in a couple areas of the stock, a little bit around the clip latch, and a little bit on top of the stock under the receiver - just enough to get the paper thin gap to see light through between the heel and legs area.

Re-assembled, and the follower seems to slide up and down much more freely and smoothly. I think with this, and with monitoring my enblocs - and discarding any that cause issues, I should be good to go.

I promise tomorrow I will take more pictures and do a better range write up.

[Punch The Clown]

Okay, broke the rifle down tonight, and well greased the track in the receiver for the follower and the follower arm. The follower arm had some crusty gunk caked up where it contacted the follower, cleaned all that off before greasing it.

I also gave a little relief in a couple areas of the stock, a little bit around the clip latch, and a little bit on top of the stock under the receiver - just enough to get the paper thin gap to see light through between the heel and legs area.

Re-assembled, and the follower seems to slide up and down much more freely and smoothly. I think with this, and with monitoring my enblocs - and discarding any that cause issues, I should be good to go.

I promise tomorrow I will take more pictures and do a better range write up.

I have spent quite a bit of time at Tim's shop, and have watched him build dozens of rifles. He uses a Bridgeport to relieve the stocks in the correct places and is close to antiseptic when it comes to assembly. Dirty parts and improperly fitted wood just ain't his style. I would call Tim before doing anything else to that gun. If he overlooked something I can guarantee he would want it back in his shop.

[awpk03s]

Thanks, I'm going to take it out and shoot it again tomorrow night and see how she does. I am really pretty confident that it's going to be good to go.

[timshufflin]

Send me the bolt, I'll grind down the ejector. It is on the close side and probably the issue. Of course, first make sure your clips are NOT the issue.

[Bair]

I had a similar issue with 7th round stoppages on my first time at the range. On my 2nd trip I pairs closer attention to loading rounds into the same clips that I used oh the first trip. I had no feeding issues.

[kangdukwon]

hi all. I am having the same issues with my mini g that i just got from Tim. my clips are US GI everything is lubed right. I only Put 40 rounds through it at the range and every clip had the same jamming problems.I think i will have to send it back and have him work the bugs out for me. :)