Post by: Jburke on March 16, 2014, 03:05:35 PM
Post by: Biggerhammer on March 16, 2014, 03:28:49 PM
Post by: CAMPMEAT on March 16, 2014, 03:39:56 PM
Post by: jay.sharkbait on March 16, 2014, 03:41:31 PM
Post by: Heredoggydoggy on March 16, 2014, 03:50:02 PM
Warning! Do not try to run your brass into a full-length reloading die unless you pull the bullet first. Otherwise, you will get a stuck case in your die!
Post by: mountainman on March 16, 2014, 05:39:05 PM
Is it doing it with factory ammo, or reloads? If reloads, and you are just neck resizing, you may be bulging the sides of the case just enough so the round is not chambering all the way. Full-length resizing is almost a necessity with autoloaders. Also check your case length on reloaded ammo. If the case is too long, which tends to happen with fired bottle-necked cases, the neck may be bottoming in the chamber before it fully chambers. Dirt was mentioned also--a dirty chamber might cause a round to not fully chamber, too. I wouldn't worry about the bolt, as long as you have a Grendel Type II bolt. :twocents::yeah:and make sure the extractor is not bound and moves freely
Warning! Do not try to run your brass into a full-length reloading die unless you pull the bullet first. Otherwise, you will get a stuck case in your die!
Post by: Biggerhammer on March 16, 2014, 07:48:23 PM
Is this with a round in the chamber?
Guess that should have been the first question. :DOH:
Post by: jrebel on March 16, 2014, 08:43:45 PM
Is this with a round in the chamber?
Guess that should have been the first question. :DOH:
If there is a round in the chamber..it is doing the same thing my .223 was doing. I bought a different bolt carrier group and it now works great. I had previously worked on and upgraded the original extractor with no success. My new bolt carrier is a Fail Zero nickle boron and it seems to cycle very smoothly.
Good Luck and please update so everyone can learn.
Thanks
jrebel
Post by: Jburke on March 16, 2014, 10:59:59 PM
Post by: carpsniperg2 on March 16, 2014, 11:17:51 PM
Post by: jrebel on March 16, 2014, 11:20:41 PM
Blackhole Weaponry barrel. All parts are new and unfired. Factory ammo, this is with a round in the chamber. The BCG closes like it should with an empty chamber.
What did the brass look like? Is it messing up the head stamp portion of the brass? I have a thread with pic when mine was having the same problem....check it out....I think it was titled "ar help".
Post by: Jburke on March 16, 2014, 11:27:05 PM
Post by: jrebel on March 16, 2014, 11:32:09 PM
I tried with two different factory loads, same results. It doesn't look like the head stamp is really messed up. The outer edge of the rim on the case is a little scratched though.
I haven't rebuilt my old bolt yet....but I am convinced the bolt was the problem. I did a bcm extracted spring upgrade and it didn't help.
Do you know someone that you could switch bolt carriers out with to see if that fixes the problem?
Post by: Jburke on March 16, 2014, 11:34:56 PM
Post by: jrebel on March 16, 2014, 11:39:44 PM
I switched the bolt carrier itself out already with the one from my 5.56, only variable that stayed the same is the actual bolt and it's components, with the same result
My bet if the bolt.....or extractor. For some reason it is not grabbing the cartridge and locking into the lugs. I am no expert but I am convinced my bolt or extractor is what went bad on mine.
Post by: Jburke on March 16, 2014, 11:52:56 PM
Post by: Jim the Plumber on March 17, 2014, 01:28:17 AM
Check the lug race ways for debris.
Post by: Biggerhammer on March 17, 2014, 06:23:35 AM
Post by: Jburke on March 17, 2014, 08:15:34 AM
Try putting a round in the bolt face, out of the rifle. Make sure the bolt is the correct one for that chambering. Try installing n empty new brass in the chamber by hand, then close the bolt on it.I actually did try this yesterday when I had taken it out shooting. When I realized there was an issue, I pulled out the BCG and the casings fit in the bolt face.
Check the lug race ways for debris.
Post by: JohnVH on March 17, 2014, 08:21:04 AM
Post by: luvmystang67 on March 17, 2014, 08:48:37 AM
I have yet to verify that mine is "fixed" because I haven't assembled things yet, but I'm feeling fairly confident now. I'll let you know how it works.
Post by: Rob on March 17, 2014, 09:31:17 AM
I contacted BHW and they verified the chamber was cut too short. I had melonited the barrel so they were unable to touchup the barrel. They instead recessed the bolt face a little and it now shoots fine. They also sent me a replacement barrel at no charge.
Post by: Heredoggydoggy on March 17, 2014, 10:12:57 AM
Your bolt locks up on an empty chamber, so that's not your problem. :dunno: ARs are a simple design, but in order for them to work, every link in the chain has to be right! :twocents:
Post by: Jburke on March 17, 2014, 10:34:57 AM
Post by: Longshot_34 on March 17, 2014, 10:40:25 AM
Post by: jay.sharkbait on March 17, 2014, 10:48:14 AM
Quick update. I have determined it is not the chamber and is bolt related. I got a round to chamber, using the forward assist, although it took a lot more effort than it should. After cycle a few rounds by hand I have came to the following conclusions. The rounds are chambering, but the bolt is not locking up as it should. The rims of the cases are definitely being scratched and damaged. It also takes a little bit more effort to pull the charging handle back to unload the round after loaded.
I would check the headspace before shooting the rifle
Post by: Jburke on March 17, 2014, 10:52:46 AM
Post by: Jburke on March 17, 2014, 12:26:33 PM
Post by: mountainman on March 17, 2014, 12:29:36 PM
:yeah:Quick update. I have determined it is not the chamber and is bolt related. I got a round to chamber, using the forward assist, although it took a lot more effort than it should. After cycle a few rounds by hand I have came to the following conclusions. The rounds are chambering, but the bolt is not locking up as it should. The rims of the cases are definitely being scratched and damaged. It also takes a little bit more effort to pull the charging handle back to unload the round after loaded.
I would check the headspace before shooting the rifle
Post by: mountainman on March 17, 2014, 12:32:43 PM
I definitely don't plan to shoot anything out of it until the issue is resolved. Can someone tell me the difference in the Type 1 and Type 2 bolts?It is in the depth of the bolt face recess, typically .124 versus .136" :)
Post by: CAMPMEAT on March 17, 2014, 01:31:10 PM
Post by: 6.8mmARHunter on March 17, 2014, 02:06:16 PM
http://68forums.com/forums/showthread.php?46066-This-was-surprising-6-5-Grendel-2&highlight=grendel (http://68forums.com/forums/showthread.php?46066-This-was-surprising-6-5-Grendel-2&highlight=grendel)
Good luck getting it sorted out.
sam
Post by: Jburke on March 17, 2014, 05:36:14 PM
Post by: Heredoggydoggy on March 17, 2014, 05:47:32 PM
Post by: GLShooter on March 19, 2014, 08:39:28 PM
Greg
Post by: Jburke on March 27, 2014, 06:32:56 PM
talked to Jason at BHW this morning and he said the headspacing was wrong on the barrel. He is making me a new barrel and matching a bolt to it. Should be a couple weeks but hopefully that fixes things. :tup:
Post by: Biggerhammer on March 27, 2014, 07:41:09 PM
Post by: mountainman on March 27, 2014, 08:11:50 PM
Post by: Blacklab on March 27, 2014, 09:22:39 PM
Post by: Rob on March 27, 2014, 09:40:35 PM
So quick update.
talked to Jason at BHW this morning and he said the headspacing was wrong on the barrel. He is making me a new barrel and matching a bolt to it. Should be a couple weeks but hopefully that fixes things. :tup:
That's the exact same issue I had with my BHW barrel earlier this year (also a 6.5 G). Makes me wonder if one of their reamers is off.