Help! Grendel Rifle not running

[Variable]

Variable here is a quote from BA "Within the Grendel models the only unit I would regard as over gassed is the 16" Tactical. The 10.5", 18" and 20" are slightly under while the 24" and 14.5" are about perfect. We are currently correcting the 16" with the removal of the 90 gr TNT ammunition and the replacement of the 100 Berger HPBT."

Maybe my memory is faulty, but it always seemed to me like there were quite a few 18" tube users complaing and going to adjustable gas... Maybe my ole' timers is kicking in though.

[sneaky one]

rasp, and to all--the H2 buffer is trully the best & easiest pop in - mod. I've ever made to the Grrr... =wow ! Smoothed the action out to a tamed -shrew?! Witnessed by a few, shot by 2,= awesome! BTW-same stock 5.56 spring. The big question is-- why did AA not put this info in with my upper, at the time of purchase?

[sneaky one]

hey bobber, I am currently replacing half my hunting ammo for deer, moose, elk, oink, etc, w/ gmx ammo. It will hit harder than heavier wt. class of (cup,core- lead taste- units.) The only reason it seems , to put an adjustable block upon it--is to minimize the effort to retreive ones brass, if one 's butler isn't there to find it..

[Mav714]

I just got back from the range today because my 6.5 wasn't feeding correctly. From what I've read here I will have to try.
Basically it seems that the trouble is more with my reloads. When I fire the first round the case doesn't eject, but gets hit or shoved back in by the next round coming up from the magazine. I've been using Hornady 123 Amax new ammo. Tried the Wolf 120's as well they work some of the time. I've been reloading with Horandy Amax and IMR8208 powder. 28.0-28.8 grains. Friend said maybe I need more powder. Can someone tell me what the Hornady reloading book gives for 123 gr Amax. Also to check my scale. Even cut down the recoil spring in the carbines stock. I've tried everything to get it to work correctly. Sounds like I'll see about the shell holder which has been said wasnt cut correctly. Oh yea I use Hornady dies.
Thanks for the info if anyone can give me other tips I'd appreciate it.