Originally posted by blackholegun
View Post
buffer weight issue
Collapse
X
-
Originally posted by blackholegun View PostAmerican Eagle 120 grain open tip match, it is the only round I can purchase locally.
I do not have the equipment to do handloads.
I did order a Spikes T2 buffer, will have to see if that helps
You might need the port opened since you have 18" RLGS.
Most 18" Grendels are MLGS, which is gassed pretty hard, but some have a more ideal Intermediate Length Gas System.
Precision Firearms introduced ILGS many years ago, and I think Odin Works uses it as well.
If your port is too small, with that reduced plug dwell time, it can cause short-stroking malfunctions.
Does the bolt ride over the base of the next cartridge when you see the malfunctions?NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
Comment
-
-
Well, shit, the heavier buffer and the JP spring did not help as I would hoped it would.
I did the one round in the mag and adjust the gas block until the bolt holds open, then one more turn open.
It works fine as a single shot.
Can not even get to the second or sometimes the third round without it not ejecting completely and jamming with more than one round in the mag.
Even tried another ELANDER same shit.
This was with the American Eagle 120 grain rounds again as that is all I have currently.
I do not know the gas port diameter on the barrel, will have to take it apart and measure it I guess.Everything I enjoy doing is either illegal, immoral or, just to damn expensive
Comment
-
-
For 18" RLGS, I wouldn't use anything more than a carbine 2.9oz buffer, if the port is .094" or smaller, shooting 120gr.NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
Comment
-
-
After the first grendel build I did with the Faxon barrel mid length gas and with the little time invested in getting it running correctly.
I think I am going to cut my losses and order another Faxon barrel.
Either it works or it does not, and this combination does not work.Everything I enjoy doing is either illegal, immoral or, just to damn expensive
Comment
-
-
Originally posted by LRRPF52 View PostFor 18" RLGS, I wouldn't use anything more than a carbine 2.9oz buffer, if the port is .094" or smaller, shooting 120gr.
Again, I am not sure of the port on the barrel as I did not measure it.
I would hope I would not have to though.
All AP and BA parts, should work, rightLast edited by blackholegun; 02-14-2018, 01:59 AM.Everything I enjoy doing is either illegal, immoral or, just to damn expensive
Comment
-
-
Is the bolt locking all the way back on the bolt catch on single shot, or does it let go when you drop a mag? If it lets go, it's not enough gas.
Running a rifle length gas system on an 18" barrel means both gas pressure and dwell are diminished. I'd try a very wide open non-adjustable block on that rifle. And standard carbine buffer or, at max, a +1. Maybe even a lightened buffer spring.
Added:
Just a Q to clear up one possibility:
How much free space do you have between the bolt lugs and the bolt catch when you pull your charging handle all the way back?"The best we can hope for concerning the people at large is that they be properly armed."
-- Alexander Hamilton, The Federalist Papers at 184-188
Comment
-
-
Originally posted by blackholegun View PostThere is about 1/4-3/8" free space from all the way pulled back to locking on the bolt catch when releasing forward.
With the adjustable gas block wide open, it would also not feed reliably.
With a marginal gas system:
Any kind or resistance is bad - rough chamber, dry BCG, new/dry rings, mag spring too stiff (new mags)...
Any kind of gas leak is bad - rough chamber, worn gas rings, loose gas block, misaligned gas block, worn gas tube, bad key seal...
You might have a weak extractor not keeping its grip on the case head when pressured by the compressed mag spring, especially with new mags.
I'd brush the chamber, check my gas key and tube end and shoot it with a non-adjustable gas block with a HUGE hole and some not-new magazines next. Sometimes these issues work themselves out after some shooting.Last edited by Tex Nomex; 02-14-2018, 02:21 PM."The best we can hope for concerning the people at large is that they be properly armed."
-- Alexander Hamilton, The Federalist Papers at 184-188
Comment
-
-
Maybe this is implied in your post, but have you tried running it with the gas block opened more? If not, I'd try opening it all the way to help eliminate undergassing as the culprit (or at least mostly eliminate, as I'm currently dealing with undergassing on a fully open block but that's on a 12" barrel). And if your still restricting gas flow through the gas block, you don't need to worry about your gas port diameter just yet.
Comment
-
-
I am going to chalk this one up as a "Lesson learned" thing.
It is only my third build, so I am by no means fully experienced with the AR platform.
I was kind of leary about the rifle length gas barrel and the carbine buffer system.
I am now to the point of how can I fix this correctly and have a reliable gun.
At this point, I think the only logical answer is to purchase a Faxon 18" barrel with mid length gas system as I have a 223 Wylde upper to run on the lower also.
Will just have to sell the BA barrel to adjust some costs I guessEverything I enjoy doing is either illegal, immoral or, just to damn expensive
Comment
-
-
Remember this for future builds: It's got nothing to do with the carbine buffer tube or carbine buffer. It is the long rifle gas system in a shorter-than-rifle barrel. It seems to need a larger gas port.
Try a different non-adjustable gas block.
-or-
Drill out the gas port. Easy with a drill press or for a shop to do.
-or-
Run a suppressor.
-or-
Try a Krink-style muzzle device.
You give up too easily. I truly believe this rig would be buttery smooth and accurate with a little more gas. Have you contacted BA and asked them how to make their barrel work? Could be out of spec."The best we can hope for concerning the people at large is that they be properly armed."
-- Alexander Hamilton, The Federalist Papers at 184-188
Comment
-
-
Originally posted by Tex Nomex View PostRemember this for future builds: It's got nothing to do with the carbine buffer tube or carbine buffer. It is the long rifle gas system in a shorter-than-rifle barrel. It seems to need a larger gas port.
Try a different non-adjustable gas block.
-or-
Drill out the gas port. Easy with a drill press or for a shop to do.
-or-
Run a suppressor.
-or-
Try a Krink-style muzzle device.
You give up too easily. I truly believe this rig would be buttery smooth and accurate with a little more gas. Have you contacted BA and asked them how to make their barrel work? Could be out of spec.
The Faxon barrel build I did worked as good as I could expect as far as function and reliability.
I am not bashing BA as my Creedmoor is shooting fine with one of their barrels.Everything I enjoy doing is either illegal, immoral or, just to damn expensive
Comment
-
Comment