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+--- Thread: 28" Satern Liberty Upper - Yea or Nay? (/showthread.php?tid=19926)
28" Satern Liberty Upper - Yea or Nay? - MegaHurtz - 11-12-2019
Hola all, from a jarhead that turned another year older yesterday.
I just started a franken 6.5G build and am considering a non-fluted 28" 6.5G upper from Satern/Liberty. I see a lot of dialog herein surrounding SBRs & 16"/18"/20"/22"/24" Grendels, but little to nothing on the 28" product from Satern's Liberty Barrels Inc. subsidiary.
My indended use is to enter the world of owning a longer-range target/plinking/fun/bragging-rights weapon (and possibly use as a supplement to my 16" SHTF/HD 5.56 home-brew carbine). I am a big boy and am not afraid of the extra weight of those inches of steel hanging out there on that upper, and appreciate that its not likely to be compatible with longer periods of carriage, especially in any environ other that open high-desert. Swinging it around inside the house will be pretty comical to observe, I suspect. :o
All of the lower's items are on order - went with a full length rifle buffer kit, Luth-AR MBS1, CTK pic rail & Monopod for the stock, Larue grip & MBT-2S two-stage trigger group, anti-walk pins, and tension screw. I also got an accu wedge just to see if it is worth the plastic/rubber it is comprised of. With the lower I just received (a Sota Arms unit), and a generic lower parts kit, I should be all set on the bottom half, I perceive. 400 rds of new-condition Hornady 123gr HPBT is enroute along with 2ea 10rd and 1ea 26rd C Products 6.5G mags (and the interface for my MagnetoSpeed chronograph to xfer data to muh phone).
Anyways, i am hoping that someone can offer learned opinions and feedback on the Satern Overwatch 28" 6.5G upper, please. TIA.
S/F
-MHz
28" Satern Liberty Upper - Yea or Nay? - VASCAR2 - 11-12-2019
There is only one forum member to my knowledge with a 28 inch 6.5 Grendel AR-15. A 28 inch 6.5 Grendel can create it’s own challenges with a rifle length gas system. The velocity gain over 24 inch is pretty minimal and I personally wouldn’t go longer than a 24 inch AR-15. The heart of any 6.5 Grendel is the barrel and for shooting long distances I want the best quality barrel I can afford. Here is a graph showing the potential for velocity relative barrel length.
![[Image: 49054323002_4bdeabce65_z.jpg]](https://live.staticflickr.com/65535/49054323002_4bdeabce65_z.jpg)
A Friend and I chronographed a 16, 18, 20 and 24 inch barrels on the same day with a magnetto speed chronograph. Look at the difference between the 20 inch and 24 inch 6.5 Grendel barrels. The gain will be much less per inch over 24 inches due to the small 6.5 Grendel case capacity.
Here is a list of the tested ammo by average velocity for each barrel length.
120 Grain HP BT PPU
16" 2392
18" 2455
20" 2480
24" 2559
110 grain FMJ PPU
16" 2510
18" 2570
20" 2614
24" 2683
123 grain A-Max Hornady
16" 2419
18" 2464
20" 2505
24" 2568
123 Grain SST Hornady
16" 2430
18" 2493
20" 2511
24" 2583
Hand Load 123 Grain Nosler CC, 31.0 grains CFE223, CCI 450
16" 2449
18" 2471
20" 2526
24" 2619
100 Grain FMJ Wolf
16" 2507
18" 2571
20" 2615
24" 2695
Hand Load 107 Grain SMK 28.5 IMR8208XBR, CCI 41 Hornady cases.
20" 2658
24" 2729
Here is the difference between the 18? barrel compared to the shorter 16? barrel which was slower with every load.
120 grain PPU HP BT
63 FPS difference
110 grain PPU FMJ
60 FPS difference
123 grain A-Max
45 FPS difference
123 grain SST
63 FPS difference
Hand load 123 grain Nosler CC
27 FPS difference
Wolf 100 grain FMJ Steel cased
64 FPS difference
Difference between 20? and 18? barrel 6.5 Grendel
120 grain PPU HP BT
25 FPS difference
110 grain PPU FMJ
44 FPS
123 grain A-Max
41 FPS difference
123 grain SST
18 FPS
Hand load 123 grain Nosler CC
55 FPS difference
Wolf 100 grain FMJ Steel Cased
44 FPS difference
28" Satern Liberty Upper - Yea or Nay? - grayfox - 11-12-2019
Roger on Vascar's post. Instead of a 28" whatever barrel, get quality 20-24" like lilja, or one from Precision Firearms (a vendor on here), or a Criterion 22" to save just a bit on costs. In addition once you get beyond about 22" the RLGS starts to cause you issues, I've heard of a few R+2 gas systems but now you're talking beyond standard...
Also, talking long range means also talking accuracy so use some of your budget on a useable chrono like magnetospeed or lab radar. High Speed+ inaccuracy=frustration and Mega costs. Nice speed+ accuracy = braggin' rights. You can't get there without a chrono.
Finally, the Hornady Hpbt's (probably the 123 Black ammo, no?) will give you some breakin plus brass, but if you want to start stretching legs get some 120 Sierra MK's and proper powders. They are more suited to starting an accuracy journey in opinion of lots of shooters on here. The 123 SST's, although I like them, don't always like everybody's barrel so if you want to try them or not, up to you of course.
Happy Birthday USMC from a Navy guy who's also getting older...!
28" Satern Liberty Upper - Yea or Nay? - MegaHurtz - 11-12-2019
VASCAR2 Wrote:There is only one forum member to my knowledge with a 28 inch 6.5 Grendel AR-15. A 28 inch 6.5 Grendel can create it?s own challenges with a rifle length gas system. The velocity gain over 24 inch is pretty minimal and I personally wouldn?t go longer than a 24 inch AR-15. The heart of any 6.5 Grendel is the barrel and for shooting long distances I want the best quality barrel I can afford. Here is a graph showing the potential for velocity relative barrel length...
Here is a list of the tested ammo by average velocity for each barrel length...
In a few weeks, you can up that # to 2.
[INDENT]
@ ZDT last night, I fell victim to a genuine impatience for continued shopping and an admitted need for instant gratification in light of not finding other complete uppers that struck the right chords with me. I went with the non-fluted so it could be cut down and rethreaded moar easily if I ultimately end up being unhappy with the hasty decision I made. They are cerakoting it for $18. I desire an all-black livery. Will be in hand in 3-ish weeks.[/INDENT]
You and your buddy must have had a ton of fun throwing that much lead at paper that day - because science - Kudos!
Thank you for your time and effort. It is genuinely appreciated.
grayfox Wrote:Roger on Vascar's post. Instead of a 28" whatever barrel, get quality 20-24" like lilja, or one from Precision Firearms (a vendor on here), or a Criterion 22" to save just a bit on costs. In addition once you get beyond about 22" the RLGS starts to cause you issues, I've heard of a few R+2 gas systems but now you're talking beyond standard...
Also, talking long range means also talking accuracy so use some of your budget on a useable chrono like magnetospeed or lab radar. High Speed+ inaccuracy=frustration and Mega costs. Nice speed+ accuracy = braggin' rights. You can't get there without a chrono.
Finally, the Hornady Hpbt's (probably the 123 Black ammo, no?) will give you some breakin plus brass, but if you want to start stretching legs get some 120 Sierra MK's and proper powders. They are more suited to starting an accuracy journey in opinion of lots of shooters on here. The 123 SST's, although I like them, don't always like everybody's barrel so if you want to try them or not, up to you of course.
Happy Birthday USMC from a Navy guy who's also getting older...!
Thank you for your service, Kind Sir.
Yep, I've a MagnetoSpeed chrono. Will have the adapter in hand in a couple of days, enabling importing numbers into Excel and geeking a bit on the data. A radar would be nice, and may be on my list at some point. However, I need to invest some sweaty equity in these endeavors, until I am sure having same will be worth the capital outlay.
The ammo is the Hornady American Gunner variety. I got it so I could break in the bbl and have once-shot reloading brass, once I am ready to traverse those paths. Until then, I'll endeavor to find a factory ammo setup that the bbl likes. We'll see...
Thanks for the time and effort in responding. It is very much appreciated.
28" Satern Liberty Upper - Yea or Nay? - Lemonaid - 11-12-2019
I ditched the accuwedge after it somehow got loose and blocked the trigger. YMMV
28" Satern Liberty Upper - Yea or Nay? - MegaHurtz - 11-12-2019
Lemonaid Wrote:I ditched the accuwedge after it somehow got loose and blocked the trigger. YMMV
Doh!
Good to know. Thanks.
-MHz
28" Satern Liberty Upper - Yea or Nay? - meatsweats - 11-14-2019
Make sure to get a quality adjustable gas block. You will most certainly need it.
MS
28" Satern Liberty Upper - Yea or Nay? - A5BLASTER - 11-14-2019
Lemonaid Wrote:I ditched the accuwedge after it somehow got loose and blocked the trigger. YMMV
Not sure how that would be possible to do. It's trapped behind and under the rear take down pin.
28" Satern Liberty Upper - Yea or Nay? - Lemonaid - 11-14-2019
A5BLASTER Wrote:Not sure how that would be possible to do. It's trapped behind and under the rear take down pin.
Murphy's law was invoked!
28" Satern Liberty Upper - Yea or Nay? - MegaHurtz - 11-15-2019
meatsweats Wrote:Make sure to get a quality adjustable gas block. You will most certainly need it.
MS
Yeah, noted. I talked with Ms. Maranda there and she was adamant that an adjustable block is not recommended.
She did volunteer that replacing the GB would not void the barrel warranty should I choose to do so anyway.
But, I can see the value in having one, especially when I start to traverse down the path of developing loads for this setup.
Thanks.
-MHz
28" Satern Liberty Upper - Yea or Nay? - grayfox - 11-15-2019
At 28" you might not need an adjustable, to be fair. however, if you do want some adjustment Ihave a Bootleg adjustable bcg for sale in the for sale section, that way you can adjust w/o messing with a gb... lil screwdriver twist right at the ejection port.
28" Satern Liberty Upper - Yea or Nay? - another caliber - 11-16-2019
I disagree. Any adjustable part on your rifle is just going to cause trouble. If your ammo doesn't work with a standard gas block and standard buffer spring and standard buffer then YOU are doing something wrong or outside the norm. Or, maybe, your rifle isn't first rate.
I've shot 100's of highpower rifle matches and I can only say that anything you need to adjust is likely to be wrong. I hate having to adjust my sling but I have a well developed card on what to do. It probably cost me several matches and $100's to get that card right and on a service rifle it would have been much cheaper since there are fewer options. Adjustable stocks are very expensive as there are way too many options: cheek riser height, length, height of butt stock, cant of butt stock...I did just as well with an A2 stock with no adjustments but I couldn't resist so I have an adjustable stock.
I've never had an adjustable trigger. I've seen too many people playing with their triggers when they should have been dry firing. I use CMC two stage triggers that are not adjustable and I'm perfectly happy to not be able to make any adjustments to the trigger although I do make adjustments to my grip and trigger pull when I realize I'm not doing it right while dry firing as I wait for the "targets up" call.
28" Satern Liberty Upper - Yea or Nay? - A5BLASTER - 11-16-2019
another caliber Wrote:I disagree. Any adjustable part on your rifle is just going to cause trouble. If your ammo doesn't work with a standard gas block and standard buffer spring and standard buffer then YOU are doing something wrong or outside the norm. Or, maybe, your rifle isn't first rate.
I've shot 100's of highpower rifle matches and I can only say that anything you need to adjust is likely to be wrong. I hate having to adjust my sling but I have a well developed card on what to do. It probably cost me several matches and $100's to get that card right and on a service rifle it would have been much cheaper since there are fewer options. Adjustable stocks are very expensive as there are way too many options: cheek riser height, length, height of butt stock, cant of butt stock...I did just as well with an A2 stock with no adjustments but I couldn't resist so I have an adjustable stock.
I've never had an adjustable trigger. I've seen too many people playing with their triggers when they should have been dry firing. I use CMC two stage triggers that are not adjustable and I'm perfectly happy to not be able to make any adjustments to the trigger although I do make adjustments to my grip and trigger pull when I realize I'm not doing it right while dry firing as I wait for the "targets up" call.
Lol
28" Satern Liberty Upper - Yea or Nay? - grayfox - 11-16-2019
another caliber Wrote:I disagree. Any adjustable part on your rifle is just going to cause trouble. If your ammo doesn't work with a standard gas block and standard buffer spring and standard buffer then YOU are doing something wrong or outside the norm. Or, maybe, your rifle isn't first rate.
I've shot 100's of highpower rifle matches and I can only say that anything you need to adjust is likely to be wrong. I hate having to adjust my sling but I have a well developed card on what to do. It probably cost me several matches and $100's to get that card right and on a service rifle it would have been much cheaper since there are fewer options. Adjustable stocks are very expensive as there are way too many options: cheek riser height, length, height of butt stock, cant of butt stock...I did just as well with an A2 stock with no adjustments but I couldn't resist so I have an adjustable stock.
I've never had an adjustable trigger. I've seen too many people playing with their triggers when they should have been dry firing. I use CMC two stage triggers that are not adjustable and I'm perfectly happy to not be able to make any adjustments to the trigger although I do make adjustments to my grip and trigger pull when I realize I'm not doing it right while dry firing as I wait for the "targets up" call.
Well. Guess we should let the experts have it, then. Glad you can shoot thataway. For us mere mortals however, a little adjustment and adaptation is just a normal part of life.
28" Satern Liberty Upper - Yea or Nay? - centerfire - 11-16-2019
Were they all out of 30" barrels?
28" Satern Liberty Upper - Yea or Nay? - Rosecrans1 - 11-16-2019
Have to agree with the hoard on this That long of a barrel will most likely REQUIRE an AGB. If you only have a 5.56 in a 14" barrel with flash suppressor and a carbine buffer, and the whole wide world had nothing but the same configuration, then I can agree somewhat. However, being able to "tweak" anything we as humans own, be it a car, truck, chainsaw, gun, ammo, PC, cell phone, outdoor grill, toaster, etc, adds to innovation and a knowledge shared on these vary same forums you are reading. The pressures created by the extra long barrel on this gun may need tweaking and an adjustable gas block may be the only way to get this upper to shoot correctly out of the box. The key word here is "may". The manufacturer "may" have it dialed in from the factory but when you add that many inches to a barrel, it's GOOD to have an adjustable gas block. Normally once it's adjusted well, it will never need adjusting again. Very few "things" that are manufactured come with no adjustment capability. The ones that don't are more likely to experience trouble and are deemed irreparable. I understand the the over-concept of too much fluff and BS on anything verses simplicity and making something right that can be adjusted wrong! These are valid arguments. However, there are somethings that should be adjustable or configurable by the end user. Most are "set it and forget it"!
28" Satern Liberty Upper - Yea or Nay? - MegaHurtz - 11-17-2019
centerfire Wrote:Were they all out of 30" barrels?
I was in the market for an upper. Was searching for discrete components to enable a build like I wanted. Stumbled across this upper. Had heard good things of Satern in other spaces. Hadn't considered a 28" offering. Did the math and determined that this struck a favorable chord with me. I can always have it cut and crowned/threaded. Having it long and wanting shorter is a lot less painful when contrasted with having it too short and wanting longer.And ... science.
28" Satern Liberty Upper - Yea or Nay? - Herzo - 11-17-2019
Just ordered a 28" 6mm AR barrel from X-Caliber. Talked to them and they said that in their experience, the rifle length has system is a problem. They strongly recommend the rifle +2" arrangement in addition to the AGB. I went with that. I see that the Satern has the rifle length on their upper - I would anticipate needing the AGB for certain.
28" Satern Liberty Upper - Yea or Nay? - Herzo - 11-17-2019
I just ordered a 28" 6mm AR barrel from X-Caliber. In talking with them, they strongly stated that the rifle length gas system was a problem and that I should go with the rifle +2" along with the AGB. In that they want a happy customer, I took their advice.
I see that the Satern uses the rifle length system on their 28" - maybe they know something that X-Caliber does not?
28" Satern Liberty Upper - Yea or Nay? - Herzo - 11-17-2019
I also noted that Satern does not state what the twist is in the barrel. I know that you are looking at the 6.5 vs my 6, but I went with the 1:7 to ensure accuracy with heavier bullets. In my case 110 & 115's. The whole point of my build is to get to 1000 yards and beyond