[NakedGOBLiN]

Hey everyone. I come to you today for suggestions to fix my XCR. Here is the situation.

Day 1
The rifle was lubed, a lot. I broke in the rifle with some Remington ammunition (about 320 rounds). After I ran out of that I tried some Ultramax crap. The rounds would not feed into the chamber completely. When I muscled them out visible damage (a scratch) was on the casing. My buddy's XCR fired the Ultramax ammunition just fine. The rifle was cleaned.

Day 2
The rifle was lubed, a lot. I shot about 80 rounds of Federal American Eagle ammunition perfectly. Then I moved on to more Remington ammunition. That ammunition worked fine for about 80 rounds and then they would refuse to eject. I had to manually cycle the rifle each time to fire. My buddy's XCR worked fine with this ammunition. Then I tried some Wolf ammunition and I experienced the same problem as the Ultramax; the ammunition would not feed into the chamber completely. My buddy's XCR fired the Wolf ammunition perfectly.

That is my situation. I've contacted Robinson Arms about this problem. I am open to all suggestions. Please help oh mighty XCR forum! Bestow upon me your great knowledge! Thanks guys.

 

[Kainam]

What gas setting are you using?

 

[Jack A Sol]

try some different mags? ???

 

[tzoid]

I would have a FTE every once in awile until I got over 300 rounds. I have exclusively used
Remington UMC 55 Grain and American Eagle BT 55 Grain..

During break in Gas Setting 4 ... Then setting 2.. I did have a FTE when I think I had the 30 round
Magazine resting on the bench while shooting.. I suspected this may have caused the problem because when I stood up and emptied the next 20 or so rounds because I got pissed..... My XCR Ran flawless..

The next trip I had the same thing happen so I switched to a 20 round Mag and never had another FTE.

Break the gun down.... remove the bolt and carrier... clean it ... inspect it.. Lube it well.. I use Militec- 1 Synthetic Weapons Lubricant.When it heats up it impregnates the metal ;D and supposedly permanantly bonds to it..Making everything run smoother and easier to clean.

I'm sure it will work itself out...Keep us posted

 

[NakedGOBLiN]

Thanks for you replies. I have been using gas setting 4 (as the break in suggestion directed). I've tried both PMAGs and standard AR-15 style mags. I'm currently waiting on Robarm's response to my problem. I will try some more Federal American Eagle ammunition as soon as I get it; as that's the only ammunition that hasn't given me a problem thus far.

 

[variablebinary]

Try a couple of mags of mil-spec M193 and M855 or anything with a NATO headstamp and see what happens. I never shoot commercial ammo

 

[i303]

NB,

Did you get a reply from RA yet?

#1 Check and make sure your GB has not come loose. It has known to happen and you'll notice that it rattles loosely. Simply tightened the allen below. Mine occurred right after my initial 300 rounds but I didn't experience any malfunctions. I also tightened it w/o any loctite and not I have about 850. I just keeo an eye on it. I'll locktite it next time.

#2 Is the problem specifically to a mag/s. I like the Pmags and I haven't experience a problem w/mine, but since it's release in march they are already on Gen 3 and offering repacements on Gen 1 and 2 bodies. I had the Gen 2 made in 06/07. If #1 isn't a problem, find the mag that DOES work and run that through 3 or 4 times fully loaded. Then test each mag individually 3 or 4 times. Usually problematic mags will show by the second time. The problems w/the Pmags seemed to happen by round 20 or round 10.

#3 Is there excessive shavings in the receiver, check the lower too. On a new gun brass shavings are common and very little non-brass. Anything about that check your parts thouroughly!!

Let us know how it turns out.

 

[NakedGOBLiN]

When I contacted RA they seemed to understand my problem immediately. I was asked to send in my barrel and bolt. They were very helpful and supportive. Alex seemed to know exactly what I was talking about. I'm hopeful. I appreciate all your suggestions and I would love to try them out but I already sent my rifle away to RA. I'll let you know what happens when I get it back.

 

[TEXAS SOLFTAIL]

NakedGOBLin, I BOUGHT my XCR 8/2/07. I took it to the range the next day with 12-30 round clips fully loaded @ 360 rounds for break in. First clip I sighted in the irons. After about 100 rounds I had 2 feed jams as you described on your day 1. I COULD NOT get the bolt to pull back with the handel,there was enough room to place a screw driver between the bolt & the receiver & pry the bolt back to free the bullet. The rest of the rounds no problem. Range time 2 hours, would have been 1 hour without sight in & jams. Let us know what RA comes up with. Thanks. T.S.

 

[NakedGOBLiN]

Hey guys. Sorry it took so long for the response. When my rifle arrived at Robinson they called and told me that they needed to drill a new barrel. Apparently the original chamber was off. I was told it's rare, but my situation is possible. Anyway, the new barrel works great. Shoots everything imaginable. I fed magazines with mixed ammo through it over and over and it shot flawlessly.

 

[Aussie Arms]

Good to hear Goblin.

 

[TEXAS SOLFTAIL]

I don't think my gun has that problem. It hasn't messed up since break-in. Glad yours is back on line.

 

[sterling99]

I had a question to ask on this topic:

On Saturday I was shooting WWB Remington out of my XCR. Magpul mags which in approx 500 rounds have never been an issue. I did not have the bolt lubed up because I am beyond that 300 mark.

I had a few new shooters trying it out on a bi pod and suddenly there was a major stoppage. I had a double feed and thought it would be easy enough to clear. I dropped the mag and the second round fell out but the round stayed in the chamber. I let the bolt fly forward and tried to fire the round, nothing happen.

I pulled back on the bolt handle and let the bolt fly forward trying to shoot the round again, nothing. I could see the round and the primer looked untouched. I thought the firing pin had busted. I broke the rifle apart making sure to keep the barrel down range. That round just did not want to come out of the chamber.

I put the rifle back together let the bolt fly forward a few times and finally I got the round to eject. I wish I had taken some pictures but the round itself looked fine.

The rifle functioned perfectly for the remaining 30 rounds I had left.

I was not going to post anything, but seeing this I thought maybe I would ask. Let me know what you guys think.

 

[ny32182]

First thought is that maybe the extractor was somehow not getting over the rim on case head when you were letting the bolt fly forward with a round in the chamber?

I hear that letting the bolt fly on a round in the chamber is a great way to produce a slamfire. I've never tried it to find out though. It makes a little bit of sense if you consider that the bolt can probably get a little more forward speed built up if it is not stripping a round from the magazine.

 

[sterling99]

I said that I always keep the barrel pointed downrange and a SLAM FIRE would have been preferable to driving home with a live round stuck in the chamber. I agree that the extractor was just not catching the round for some reason. Just curious if anyone else had an issue like this. I plan to take it out this weekend and try to knock it over 750 rounds.

 

[Aussie Arms]

Perhaps a quick call to RobArm might be in order before your next range session. They might have a quick fix for you. It might have been something as simple as a grain of sand in the chamber, or a misshaped cartridge.

 

[sterling99]

I will give it a good once over and if there is a problem then it needs a new gas system anyway!

 

[LoadedDrum]

NakedGOBLin, I BOUGHT my XCR 8/2/07. I took it to the range the next day with 12-30 round clips fully loaded @ 360 rounds for break in. First clip I sighted in the irons. After about 100 rounds I had 2 feed jams as you described on your day 1. I COULD NOT get the bolt to pull back with the handel,there was enough room to place a screw driver between the bolt & the receiver & pry the bolt back to free the bullet. The rest of the rounds no problem. Range time 2 hours, would have been 1 hour without sight in & jams. Let us know what RA comes up with. Thanks. T.S.

I had the exact same problem a few times in one range session with my first XCR. The only way I got the bolt back was to remove the barrel. The problem has never rematerialized. Did you ever figure out what caused it?