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Discussion Starter · #1 ·
This is my first real shooting-related problem I've had with the XCR. Was first shooting Remington UMC today. Shot 40 rounds with one failure to cycle properly, so I turned the gas setting up from 2 to 3 (I think this was the first failure I've ever had with my gun). Then I moved on to Wolf .223 62 gr. steel cased. This ammo won't cycle the weapon at all. I had the gas turned all the way up to 4. After the round was fired the bolt head would get stuck in the barrel extension. Manually trying to charge the handle would do nothing. Only "pogo-ing" the gun would let the empty cartridge get free of the weapon. This happened consistently with each new round. I opened up the rifle and litterally dowsed everything with Break-Free CLP, then tried again. Immediately after the gun fired about two rounds (shells ejecting very weakly about 1-2 feet out) then jammed up again. I tried with multiple mags with no difference. My XCR round count is about 700 now so it's past its "break in" period.

I know Wolf is low powered ammo, but it should at least cycle at full gas setting shouldn't it?
 

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Did you try rounds from different boxes? May be a bad batch. Did you fire any other ammo type after that successfully?
 

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Discussion Starter · #3 ·
Yes the rounds were from different boxes, though probably bought at the same time. That was the last of the ammo I brought today so I'll have to wait till my next range trip to try anything different.
 

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could be a bad batch, agreed. How many rounds total are through the rifle? My XCR has run great without a single hiccup for around 7000 rounds, the only time I've had to turn it up to 4 was for a shitty batch of Wolf. The spent cases were plipping a couple feet out. Shoddiest stuff I've seen..
 

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Simple solution....don't buy any more Wolf. None of my XCRs will eat it either. Lot number doesn't seem to matter as I've shot Wolf black box from 3 different lots with similar results. Oddly enough the 1K lot of Wolf Military Classic I put through the guns ran fine....but I wouldn't buy more based on the experiences with the other Wolf (black box).

Alex doesn't recommend Wolf and instead recommends Brown Bear....

Good luck.

Sean
 

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Simple solution....don't buy any more Wolf. None of my XCRs will eat it either. Lot number doesn't seem to matter as I've shot Wolf black box from 3 different lots with similar results. Oddly enough the 1K lot of Wolf Military Classic I put through the guns ran fine....but I wouldn't buy more based on the experiences with the other Wolf (black box).

Alex doesn't recommend Wolf and instead recommends Brown Bear....

Good luck.

Sean
I think the quality of all these are hit or miss with bad batches in probably all. After several PM's with DTOM discussing our conflicting results a while back, I have been trying more batches of all the brands in 223 and 7.62 except for those new white boxes marked hunting cartridges that someone posted about the other day. I have found that the quality varies from lot to lot on all this stuff.

Recommend that the OP try some factory brass ammo as first troubleshooting step and avoid reloads until you have current problem figured out.
 

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I've seen bad boxes of wolf do that, the rim of the cartridge will get ripped off... however, this sounds like a typical bad gas block. I have dealt with (feels like)(actually no, I really have dealt with hundreds of these) . Now that Robinson stopped machining their own gas blocks, the problem ceased (mostly) Take a .454 gauge pin and if it fits in the top hole of the gas block, it's shit. Even if you have a bad gas block, sometimes you won't know until you shoot Wolf because it is pressured so low so measure it with the gauge pin to eliminate it from your list. I run mostly wolf and rarely have problems.
 

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Simple solution....don't buy any more Wolf. None of my XCRs will eat it either. Lot number doesn't seem to matter as I've shot Wolf black box from 3 different lots with similar results. Oddly enough the 1K lot of Wolf Military Classic I put through the guns ran fine....but I wouldn't buy more based on the experiences with the other Wolf (black box).

Alex doesn't recommend Wolf and instead recommends Brown Bear....

Good luck.

Sean
I think the quality of all these are hit or miss with bad batches in probably all. After several PM's with DTOM discussing our conflicting results a while back, I have been trying more batches of all the brands in 223 and 7.62 except for those new white boxes marked hunting cartridges that someone posted about the other day. I have found that the quality varies from lot to lot on all this stuff.

Recommend that the OP try some factory brass ammo as first troubleshooting step and avoid reloads until you have current problem figured out.
Are you also checking Brown Bear or solely the different kinds of Wolf/Tula?

Sean
 

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I've seen bad boxes of wolf do that, the rim of the cartridge will get ripped off... however, this sounds like a typical bad gas block. I have dealt with (feels like)(actually no, I really have dealt with hundreds of these) . Now that Robinson stopped machining their own gas blocks, the problem ceased (mostly) Take a .454 gauge pin and if it fits in the top hole of the gas block, it's shit. Even if you have a bad gas block, sometimes you won't know until you shoot Wolf because it is pressured so low so measure it with the gauge pin to eliminate it from your list. I run mostly wolf and rarely have problems.
Finally, some good tech!!! :D Thanks for the info. At least I have something else to check.

For those that need the info.

16" 5.56 rifles should have a .070" bbl gas port and a .136" gas block port. The largest #4 gas dial port is .125".

9" 5.56 bbls should have a .086" bbl gas port.....gas block port is still .136" and #4 dial port is .125".

Anyone else notice that their dial ports become significantly clogged within a few hundred rounds?

JFYI.

Sean
 

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Are you also checking Brown Bear or solely the different kinds of Wolf/Tula?

Sean
I'll send you PM - but different Wolf, different Bear and Golden Tiger (7.62x39 only on this).
 

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Also, if you want to be more precise, get a 453 4535 and a 454 and see how close the tolerance is. One end could be larger than the other and if the 4535 can be rotated while inserted in the hole or otherwise feels loose, but the 454 doesn't quite go in, it is still technically out of spec and therefore problematic for ammo pressured towards the lower end.
 

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Also, if you want to be more precise, get a 453 4535 and a 454 and see how close the tolerance is. One end could be larger than the other and if the 4535 can be rotated while inserted in the hole or otherwise feels loose, but the 454 doesn't quite go in, it is still technically out of spec and therefore problematic for ammo pressured towards the lower end.
Again: THANK YOU!!! Most helpful. We have a bunch of precision ground gauge pin sets at work. I'll have to get them out and see if that's a part of my problem.

Sean
 
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Ghost, I think Gessepe has nailed it here. It does not sound like an ammo problem to me at all, it sounds like a gas delivery problem.

Remove your gas block and check for restrictions in the flow pathway and check what gessepe has said as well.
 

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Brandon, you silly boy, you don't build a cake... you bake it...

And golden tiger is good stuff. You can usually find decent pricing too.
 
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