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Tedward

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Reply with quote  #16 
Quote:
Originally Posted by Tedward
Funny finding things in the history log. It's been going on since 2011, and longer.

http://www.65grendel.com/forum/showthread.php?224-6.5-Throating-Reamer&highlight=chamber+cast

People with access to the 6.5 Grendel Forum need to follow this link and just reply to bring it out of the woodwork. They removed my post, this is why I got banned. Factory Ammo being stuck since 2011 and bwaites is right there on the thread.
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Borrego Bob

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Reply with quote  #17 
There are lots of examples of factory ammo getting stuck when i did some google research. The main culprit was actually AA but AA ammo 120gr TTSX seems to be a problem with multiple barrel barrel makers. Seems to have been a problem from the beginning. One guy had a 120gr TTSX stuck in a Liberty barrel and they were able to frighten the newbs into thinking that Liberty barrels had an issue so no one noticed the bigger general Grendel issue as a whole and AA 120gr TTSX factory ammo in particular. 
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Tedward

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Reply with quote  #18 
That's what I noticed too. I did a search on the forum under "castings" looking for the clay project (casting comparison of a Liberty and PF chamber and throat) that was used for the Liberty Barrel"Case Closed, its not a Compound Throat" per JA Smith. That search took me back to 2011 and I found that thread about bullets getting stuck.

I love how the PF Casting was nice and smooth and the Liberty Casting was full of air bubbles (like a 3rd grade clay project is what I said). (nothing against PF, they just used him, it could have been Lilja) Then JA Smith said yesterday you could see that there was no compound throat on the Liberty Barrel in the casting. Thats what got me started and how could he identify there was no compound throat from that casting...come on, get real...that makes me sick!

just ironic....

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Constructor

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Reply with quote  #19 
Hopefully Satern starts using the other chamber and it proves to be better than the compound throat chamber. Proof is in the pudding and people will flock to what works best.  Sooner or later most will see through the BS that has been posted on that forum for so long.
Funny thing is they are still talking about the Grendel as a military round. If it had .010 more taper in the case, a larger lower receiver to accept wider mags that work and a stronger bolt design maybe but then it wouldn't be a Grendel.

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Tedward

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Reply with quote  #20 
All Satern is going to use is the GII in the button barrels, that is what I've been told directly from them.

I have a hand-full of the new GII 18" Liberty Barrels and will be testing the one I'm keeping this weekend. Not sure if I'll even use my Lilja barrels, might just have to part with them too and wait for the 20" & 22" Liberty Barrels, about a month out on them. So I'm retiring my 24" AR-Stoner and will keep it for a rainy day. Still shoots ok but want to keep all of my new brass formed to the GII Chamber.

What I've read is that its better on the brass if the same chamber is used and don't mix up what rifle your shooting particular brass thru. So if reloading, keep your brass loaded and reused for a particular barrel. Again not even sure how true that is anymore. Any in site on this??

I have a bunch of new Lapua Brass I'll be loading particularly for the GII Chamber which should be able to use the same formula for the 18" & 20". I think the only difference will be that I need to do the load build up to see if there is a difference in the rifle length gas ssytem compared to the Mid-length. But the OAL should be able to be the same.

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c4isfun21

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Reply with quote  #21 

Based on the contents of this thread, I’m hoping you all can be of some service to helping me finish out and fully understand my Grendel SPR build.  And while I’m the type of person who enjoys spending far too much time reading and schooling myself up on something new, the arena of Grendel info out there has not been very consistent or rewarding to do so.

 

I prematurely purchased an assembled Grendel upper when it was on sale after I believed I had done enough reading on the cartridge to justify the purchase and work out the finished product later.  My purpose for this rifle is to replicate the DMR type platform, keeping the recoil and ease of shooting close to the 5.56, while wringing out some better performance and accuracy out to 600 in case I want to hunt with it.  I’m not going for competition level accuracy, but I’d like it to hold a minimum of 2 MOA at 600.  I’m not a handloader either, so I would be going with OTS match ammo.  I currently use this upper on a DPMS lower from a 16” carbine gas rifle.

 

The barrel of this upper is an 18” mid gas Satern/Liberty Grendel II 1-8, presumably manufactured in Q1 2015.  It has a free float rail, milspec M16 carrier, and the headspaced bolt Satern provided with the barrel.  I have only had the chance to informally fire a handful of rounds through it, and have yet to actually zero and start collecting dope with the Vortex Viper PST 2.5-10 scope sitting on a 30 MOA mount.  Unfortunately, 2 out of the 5 rounds I put through it had shallow FP indents and failed to fire (80% sure it was 123gr Hornady, not sure if A-max or SST).

 

In the next few weeks I’ll be able to get a good half day on the range with several different loads to start at square one, diagnose any obvious issues, and get it set up properly.  I also wouldn’t doubt that the buffer spring in the lower I’m using has begun to fatigue and I’m sure the spring/buffer combo I’m using may need reconfiguring anyway to work well between both the 16” 5.56 upper and the Grendel upper.

 

I’m hoping that the collective here can school me up a little on what I need to know/keep in mind with the Grendel II Liberty barrel in this scenario, any known issues with spring/buffer combo for this gas length & cartridge, and any known issues with the bolt or firing pin in the Grendel platform.  It would also be helpful to know if there are any specific break-in procedures and what the most likely ammo to cycle and perform well would be for this barrel.

 

I recognize that this information is probably out there, spread out all over the place, but as the OP mentions initially, the level of drama surrounding this cartridge and barrel is extreme, and has greatly diminished my usually high motivation to find it all myself.  Thank you very kindly in advance and I apologize for the length of my post.

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Tedward

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Reply with quote  #22 
Just go shoot it. Make sure you use Grendel Mags and you will be fine with factory ammo, stock buffer and spring used in your 556. The only thing you need to be aware of it is much more accurate than your 556 will be. 

The Satern Barrels demonstrate sub MOA with the right person behind the trigger. Also look at your bolt, does it have 4 rings around the body of it? If it has rings, that's a sign of it being a MAXIM bolt and they are correctly head spaced.

And last, you say you bought an upper, did you mean complete assembled upper? Satern doesn't sell assembled uppers, so wondering where you got the upper? 



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Borrego Bob

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Reply with quote  #23 
As i posted on your other thread around that time Satern had quality issues with a certain bolt maker and dropped them for that reason i recommend taking it up with Satern or just ordering a bolt from Maxim Firearms. 
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c4isfun21

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Reply with quote  #24 
Thank you for the responses gentlemen, here and on my introduction.  I checked the bolt.  Definitely not a Maxim, and it barely moves along the bolt carrier chamber from being so tight.  Probably just needs a heavy lubing and some rounds put through it to smooth out.

The assembled upper came from Runner Runner Guns in the DFW area.  Not a well known bastion of superior quality lol, but I read some solid reviews, spoke to them directly, and from all indications I found, they seemed to be reputable and just trying to put out solid products for fair prices.  The upper passes the eye and feel tests.  All the components look to be of solid quality and proper assembly.  When asked about the origin of the bolt in a recent email, they confirmed that it was indeed the Satern issued bolt that was headspaced at the factory.

I'm going to go ahead and replace the buffer spring in the lower, as it probably needs it anyway with its current round count.  Beyond that, I'll just get it to the range and be patient with it.  If it's not acting right by 100 rds, then I'll probably reach out to Satern and Maxim to go from there.  Or do you think based on the bolt issue Satern had, I shouldn't wait and contact them now?

The mag I have is the ASC 10 rd.  Anything better?

Thanks again for the help.
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grayfox

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Reply with quote  #25 
As a newbie here, I'm reading up on this history.  Interesting.  Those quick to ban someone must be afraid of something... I got started in considering a 65G by reading and hearing about the 264LBC... so it's kind of a Grendel II, that's fine.  Folks should be able to hear or read all sides of an issue and make up their own minds.
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