What a diff, a barrel makes

[A5BLASTER]

Sorry but what I see is a mag issue and not in any way is it a case design issue.

Be willing to bet if the feed lips on those mags were checked that one are both of them are not in the right position and causing the issue.

So again I'm going to ask you to profuse imperial data from the last 5 years showing that the grendel case design causes the bcg to work harder are have issues stripping a round from the mag.

No people complain about how hard it is to load elander grendel mags.

Your elanders are not 100% if your having feeding issues.

So here we are full circle, you have a mag issue and not a case design issue.

[Splatt]

Spred the lips, and relieve the mag catch hole so the mag rides lower.

[FLshooter]

My elander mags SUCK !
1 will chamber from a mag on the first round, the other nose dives the round into my feed ramp.
Just ordered 2 asc 10 round mags for 13.99 each.
Hope these work better.
So, I did have other issues.
1st off, accuracy was NOT, to be expected. The American Gunner ammo, would cycle, and lock back the bolt.
When purchased, the barrel had an adjustable gas block. Brand, unknown to me.
Switched to my reloads.
Switched to a single round mag, so all variables were the same.
Round goes off, bolt would eject brass, but not lock back.
Have never had, nor needed an adjustable gas block.
Loosened set screw, screwed adjustment screw out for more gas.
Gave up after taking screw out, and just enough in to hold.
Junk.
Accuracy SUCKED.
Pulled out a steel, non adjustable gas block when I got home, switched, and reshot the other day.
Wow! What a diff.
American gunner, 1st 2 rounds at 100 yards, 1/2" !
Went to squeeze trigger, nothing, jammed round ! Junk elander mag.
Drop mag, drop round into chamber, trip carrier, insert mag, fire. 11/4" high ! Ok... next round chambered. Fired. 3rd round groups back with first 2, 3/4" !
Next round, jammed.
I'm done !
Gas block definitely made a diff. in accuracy. Why ?
Haven't had time to load, working on other cartridges.
Will try reloads again, this week tho.

When I purchased my 1st Grendel upper,I was told by fellow shooters to stay away from E Lander mags.So, I started with and only ever owned ASC mags. Never had a problem with them they?ve all worked flawlessly.ASC mags work well in my RAP and both of my AR grendel builds.
As for as adjustable gas blocks. One came with my PSA 18 inch 308 upper.I had FTEs and accuracy problems. I was told to swap out gas block with a standard one.Now it shoots more accurately and no FTEs. So,adjustable gas blocks is another thing I stay away from.
I am still not 100% happy with my PSA barrel. I am waiting on a 24 inch custom heavy barrel from Precision Firearms. I think PSA uses quality parts in their uppers. I like the receivers and hand guards. I always end up swapping out the PSA barrel with a quality barrel.
But,I am looking for accuracy and tight groups at 600 yards.A PSA barrel will probably be accurate enough for hunting. Purpose and preference is what it comes down to. Don?t forget trial and error. Things that work for some folks may not work for you and vice versa.
But now days ,before I consider purchasing a firearm,accessory,or reloading component that I am not familiar with, I run it past the guys on the forum. Sometimes I get mixed advice. But after a while you know who you can listen to.

[PNWTargets]

One factor to feeding rounds besides the magazine and ammo is buffer spring/weight for BCG timing. The other is gas flow. I have tested multiple 6.5 and 5.56 set ups to get feeding and last round bolt stop to work correctly. Just some things to keep in mind.

[lazyengineer]

FWIW, I was curious and did test just now. I have to admit, the drag on an E-Lander mag when stripping is quite a bit higher than the drag on a C-Products mag.

My E Landers run, but it's kind of on the edge, so try a different brand if having troubles.

Interesting.

[PNWTargets]

The E Lander high capacity mags I have work good. Sucks some people have feed issues.

[GeekShooter]

Short version is that PSA Grendel uppers may be very over gassed from the assembly line and may need a hundred rounds down the pipe before it groups well. Still beats my buddies BCA which came with an extractor reworked from another caliber and way out of spec. Replacement extractor from BCA was even worse. So bad that I recommended he not even load a round in at all. He gave up and ordered an Alexander arms extractor.

I posted here about the PSA 18 inch complete upper having some issues as my first post. This was my first Grendel. Mine was significantly over gassed to the point where it was outrunning the bolt catch which may have had a bit to do with the mag as well. I got it tuned right for 123gr ELD and 100 gr wolf. I also took @a5blaster suggestion (thanks) and grabbed up a RTB low mass bolt carrier but also followed my own thoughts and added an armaspec stealth H weight spring to compliment the low mass carrier. Lastly I hand lapped the upper, re-torqued the barrel nut, and cleaned up the crown. Giant difference in recoil, cycling, and accuracy in a very good way. Consistent sub MOA groups now.

Bought it and the Strike Eagle on the cheap and got about what I wanted after putting in a bit of time and changing some things around on it. Best part was it hooked me on grendel. Now I have built a much higher end full custom from barrel on up. Currently curing the Duracoat job right now. This one is 14.5 inch that I pinned and welded to 16.125 (ATF measurement method). Got it all dialed in before stripping it down to Duracoat and recorded a 100 yard 3 shot group of .449 inches with 123gr Hornady Black ELD Box ammo. 2 more weeks of curing before I can complete final assembly and chronograph.

[Splatt]

Not sure what my problem with gas was, but it's running just fine now since I got rid of that adjustable gas block, and put on a micro, non adjustable. The pos, now resides in the extra's box. Somebody want it ?
Give me a reasonable, shipped, offer, and it's yours.
I need to go to Shooter Pro Shop, and order a bunch of partitions.
Gonna test more, just to make sure that group wasn't a fluke.