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Posted: 7/31/2018 1:03:51 AM EDT
[#1]
Because of the substantial elevation and barometric pressure changes I shoot across, I use a 100yd zero mostly.
My 12" was just field-zero'd at the last course I ran towards the end of Day 1. I fine-tuned that zero on steel on Day 2 in one of the canyons, which ended up being maybe a 150yd zero. When I shot it at 75yds last week, it was pretty close with 120gr Federal OTM. 90gr TNT was pretty high. Original loads were all 123gr Hornady American Gunner. You have to hear this little thing hit steel at distance. |
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Posted: 7/31/2018 11:11:00 AM EDT
[#2]
Quote HistoryQuoted:
Because of the substantial elevation and barometric pressure changes I shoot across, I use a 100yd zero mostly. My 12" was just field-zero'd at the last course I ran towards the end of Day 1. I fine-tuned that zero on steel on Day 2 in one of the canyons, which ended up being maybe a 150yd zero. When I shot it at 75yds last week, it was pretty close with 120gr Federal OTM. 90gr TNT was pretty high. Original loads were all 123gr Hornady American Gunner. You have to hear this little thing hit steel at distance. 
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Posted: 7/31/2018 12:21:38 PM EDT
[#3]
Quote HistoryQuoted:
For my complete Stealth 2.0 Grendel so I can have a short profile with the TranQuilo can. I'll probably do 13 7/8" pin and weld the TranQuilo brake. I can already see my 12" Suppressed being commandeered by wife and kids. Daddy has to have something to shoot suppressed as well. Here's what another forum member did and what I'm talking about: https://www.ar15.com/media/mediaFiles/60910/20180723_211428-617474.jpg Anyway, 23 OZ!!! Hold fuckballs man, that thing is gonna handle like shit. Maybe put that pig on a 9” barrel?? |
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Posted: 8/8/2018 10:42:22 PM EDT
[#4]
Here are some size comparisons with the 12" suppressed under 16" and 18" Grendels:
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Posted: 8/10/2018 3:21:26 AM EDT
[#5]
Thanks for the pics. Looks great next to that 16" w/ reg flash hider. Great fuckign combo that barrel and the TBAC can...
I'd put an A5 RE and a more comfortable brace on there tho maybe that SBA3 one. |
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Posted: 8/10/2018 11:00:47 AM EDT
[#6]
The PDW brace is from Maxim Defense, and the action spring is stronger than a standard carbine.
The cyclic rate on it feels more controlled than a standard carbine, as the return stroke into battery is much more positive. I was surprised at how well it cycles. An A5 would make it much longer overall, defeating my intent to have a more compact package, and then would require SBR registration, with all the penalties of practical use that come with that. (Can't have it in the vehicle compartment loaded and accessible, must submit ATF Form 20 5320.20 request to cross State lines, pay $200 for Form 1, serialized engraving to the lower). |
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Posted: 8/11/2018 8:32:36 PM EDT
[#7]
The SBA3 brace fits on a regular keyed carbibe RE. Would be a bit longer than the PDW brace sure but still adjustable
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Posted: 8/11/2018 9:47:18 PM EDT
[#8]
Great Thread.
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Posted: 8/16/2018 10:56:12 PM EDT
[#9]
uugh, was thinking of a 16 inch build but now im thinking of a 12+ suppressed
 good job
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Posted: 8/16/2018 11:54:50 PM EDT
[#10]
Quote HistoryQuoted:
uugh, was thinking of a 16 inch build but now im thinking of a 12+ suppressed good job For compact and performance, the 12" is hard to beat. 18" actually does pretty well for long range. |
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Posted: 8/17/2018 12:17:46 AM EDT
[#11]
Quote HistoryQuoted:
I started out with 16", then 17.6", then 22", then 18", then another 18", then 22" again, then 18", and now 12". For compact and performance, the 12" is hard to beat. 18" actually does pretty well for long range. I should get the Larue UU Kit in 6.5 Grendel with the 18" barrel first. And then get the Larue Stealth 2.0 upper/handguard combo with the 10.5" handguard! 
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Posted: 8/17/2018 2:20:55 AM EDT
[#12]
Did you fire the shorter barrel alongside a 16" or 18" just for the hell of it to compare drop at the various 100 yd lines?
Would be interesting to see the results. |
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Posted: 8/17/2018 5:57:22 PM EDT
[#13]
Quote HistoryQuoted:
Did you fire the shorter barrel alongside a 16" or 18" just for the hell of it to compare drop at the various 100 yd lines? Would be interesting to see the results. My Kestrel + ballistics program data is so accurate, that I often see center-punched steel across the course, as long as I have accurate BC and MV data. So I have learned to trust the programs a lot more than I thought I would. This has been one of the biggest changes to the long range shooting discipline that I've witnessed over the past 30 years. We used to make guesses based on log books, which quickly got thrown aside after seeing where 1st and 2nd rounds impacted, then took it from there. Now I walk up to an area, like when I've gone camping, break out my rifle from the soft case, look at my Kestrel, plug in the barometric pressure and temp data, and will make 1st-round hits on 12" steel even in lowlight conditions, cold turkey. That comes with reading the wind most of my life too though. From a practical perspective, I don't feel a big difference between the 12" and a 16" or 18", other than recoil. The little gun with CLGS likes to muzzle climb a bit more, but suppressing it took most of that away. It's not bad, somewhere between a 5.56 and AK, but noticeable compared to a smooth 16" MLGS Grendel. Looking at the numbers right now, I'm seeing the same drop at 200yds in mils, 2.9 vs 2.8 mils at 400yds, but I look more importantly at the wind. 123gr Scenar or SMK drop/wind drift, Litz G7 BC .260, 12": 2320fps/18": 2441fps 600yds 12": 5.8/1.6 mils 18": 5.4/1.5 mils 700yds 12": 7.6/2 mils 18": 6.9/1.8 mils 130gr Berger OTM Hybrid 12" vs 18", .282 G7 BC, 12": 2250 vs 18": 2380fps 600yds 12": 6.1/1.6mils, 18": 5.5/1.4 mils 700yds 12": 7.9/1.9mils, 18": 7.1/1.7 mils Wanna see something really crazy though just to get a reference? .308 Winchester, 20" barrel AR10, 175gr Sierra Match King, .243 Litz G7 BC, 2500fps mv 600yds 5.3/1.6 mils 700yds 6.8/1.9 mils |
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Posted: 8/20/2018 10:50:59 AM EDT
[#14]
Lrrp,
Has anyone ever played with extra long projos and faster twist barrels to see if subsonics worked? Anyway, thanks for the data! This is making a 14” permmatach look very good! |
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Posted: 8/20/2018 10:58:54 AM EDT
[#15]
Quote HistoryQuoted:
Lrrp, Has anyone ever played with extra long projos and faster twist barrels to see if subsonics worked? Anyway, thanks for the data! This is making a 14” permmatach look very good!  6.5 Grendel Subsonic Suppressed |
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Posted: 10/2/2018 4:08:21 PM EDT
[#16]
Quote HistoryQuoted:
Grendel twist is already there at 1/8 or 1/7.5, and yes, several people have done subsonic with 140-160gr.  https://www.youtube.com/watch?v=fqWQSnQ0mzII'm gonna have to run the numbers and see what the likely traj for those is. ETA: 140gr Hornady HPBT Black launched at 1050 slows slightly less drop, slightly better velocity than a 220gr Match King as expected. Sectional density not as good as the 300 though. I'll have to run it for 160gr later. Energy: 100y 140gr 318 ft-lbs 220gr 484 ft-lbs 200y 140gr 297 ft-lbs220gr 455 ft-lbs 300y 140gr 280 ft-lbs 220gr 430 ft-lbs Sectional Density 140gr 6.5G .287 160gr 6.5G .328 220gr Blackout .331 |
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Posted: 10/2/2018 5:06:14 PM EDT
[#17]
Quote HistoryQuoted:
Grendel twist is already there at 1/8 or 1/7.5, and yes, several people have done subsonic with 140-160gr. https://www.youtube.com/watch?v=fqWQSnQ0mzI |
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Posted: 10/3/2018 1:50:48 PM EDT
[#18]
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Posted: 10/3/2018 1:58:03 PM EDT
[#19]
Quote History |
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Posted: 10/14/2018 1:18:42 AM EDT
[#20]
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Posted: 10/14/2018 12:27:08 PM EDT
[#21]
 Attached FileI finally had to do a pistol. I've got a couple SBRs but, as said here, a pistol makes more sense sometimes. It's a Lilja 11.5, great shooter. |
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Posted: 10/24/2018 5:03:08 PM EDT
[#22]
Quote HistoryQuoted:
https://www.AR15.Com/media/mediaFiles/52425/fullsizeoutput_b1_jpeg-704894.JPG I finally had to do a pistol. I've got a couple SBRs but, as said here, a pistol makes more sense sometimes. It's a Lilja 11.5, great shooter. I just put another GRSC in a LaRue SPR 1.5 for my 12": 
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Posted: 10/28/2018 10:47:46 AM EDT
[#23]
$h_t! I am jumping on this 6.5 G pistol band wagon. Already have a 300BO but looking at ballistics and cost, I can play with Wolf 6.5 grendel out to 100 yds for cheap then switch over to Hornady for beyond 100, don't have the same options with the 300BO.
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Posted: 10/28/2018 5:53:05 PM EDT
[#24]
Quote HistoryQuoted:
$h_t! I am jumping on this 6.5 G pistol band wagon. Already have a 300BO but looking at ballistics and cost, I can play with Wolf 6.5 grendel out to 100 yds for cheap then switch over to Hornady for beyond 100, don't have the same options with the 300BO. I went down to North Springs with another forum member Friday and spent the day at the range, starting off with LR at Buffalo Canyon. Took his .223 Wylde SPR Mk.12 out to 800yds, as well as the 12" Grendel. Wind wasn't that bad, cancelled itself out at one point, then got to where we only needed 1 mil holds at 800yds to connect consistently. I got to stand off to the side for the first time and listen to the 12" with the TBAC Ultra 5. There is a definite pop, but it's pretty muffled. Sounded less than a .45 ACP pistol, maybe more equivalent to a longer barrel 9mm without the sharp crack at the muzzle. No hiccups at all from the 12" Grendel still with 123gr Hornady or anything suppressed. The only cartridge that won't run the action is the 90gr TNT Federal, which isn't a surprise with the reduced plug dwell time and the really stiff action spring in the Maxim Defense PDW brace RET. Once I attached the suppressor, it ran the 90gr TNT on all 4 gas settings of the Bootleg Adjustable carrier. |
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Posted: 11/3/2018 11:05:27 PM EDT
[#25]
Just got back from NS Range again today. Took it out to 800yds out of the gate with the scope on 4x using the GRSC stadia, and got continuous hits after initial register.
It's fun to break the shot, not see any dust kick up around the steel, then hear the "bonk" within 2-3 seconds...over and over, using something the size of a Sub Gun! I had my kids shoot it too. This was the first time I took out my little ones. We did some .22 LR first, then shot some bigger things. Went to the cowboy town and shot steel sils in the bays for fun. |
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Posted: 11/10/2018 8:52:07 AM EDT
[#26]
Well I hate to report this but my 12" Faxon 6.5g did not do so well. Function - 100%, even with a tuned gas system (lightweight + adjustable gas carrier). It sure is a soft shooting stick. Accuracy wise, not so well. 2.25 - 2.5 moa with Hornady Match SST/A-MAX. Close to 3 moa with cheap Wolf stuff. I've a few Faxon barrels in 556 for competition and all are moa shooters. This one stumped me. Scope is a Burris RT6. Range is 7500 feet elevation @ 32 degrees (yeah d@mn cold and it isn't middle of winter yet!). For comparison I pulled out the 20" Howa Mini Action (not an expensive PRS rifle by any means) and shot the same ammo, same conditions @ 6x, it yielded 1-1.25 moa groups - For sure it wasn't the ammo or the shooter.
I might have gotten a bad barrel. Stripped it and boxed to go back. For the purpose of this thread, I'm convinced the shorty 11"-12" 6.5 grendel is a great multi-role tool. |
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Posted: 11/10/2018 12:04:12 PM EDT
[#27]
A buddy of mine put together 4 Grendels recently using Proof, Faxon, PF Bartlein, and Krieger barrels.
His PF Bartlein 12.5" is shooting 1/10th mil groups, so think about 1/3rd MOA. He said he was 20/20 at 960yds with Seekins billet set, bedded, with an OSS Ti suppressor and an Hk416 PDW stock. Correction: I looked back at his text to confirm, and it was his 20" Proof barreled Grendel, not the 12.5" at 960yds. I want to be as accurate as possible and not spout misinformation. With the 12.5", he was shooting it at 1190yds on an IPSC plate with 60% hit rate using 123gr Hornady Black at 2290fps with 9.5fps SD. |
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Posted: 11/10/2018 1:50:25 PM EDT
[#28]
Quote HistoryQuoted:
A buddy of mine put together 4 Grendels recently using Proof, Faxon, PF Bartlein, and Krieger barrels. His PF Bartlein 12.5" is shooting 1/10th mil groups, so think about 1/3rd MOA. He said he was 20/20 at 960yds with it using 123gr ELD-M. Seekins billet set, bedded, with an OSS Ti suppressor and an Hk416 PDW stock.  Wow...just wow! You do get what you pay for!!!
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Posted: 11/22/2018 10:14:38 AM EDT
[#29]
So you motivated me to do a similar build. Bought a 12.5” BA barrel, added an adjustutable gas block, and a BA bolt. Was going to pick up a PA 1-8x but wasn’t a fan of either reticle. I’ll wait on the scope for now and have a 1-4x vortex I can use in the meantime. Gotta pick a rail still. Any suggestions to keep it cheap?
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Posted: 11/22/2018 11:01:12 AM EDT
[#30]
Quote HistoryQuoted:
So you motivated me to do a similar build. Bought a 12.5” BA barrel, added an adjustutable gas block, and a BA bolt. Was going to pick up a PA 1-8x but wasn’t a fan of either reticle. I’ll wait on the scope for now and have a 1-4x vortex I can use in the meantime. Gotta pick a rail still. Any suggestions to keep it cheap? |
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Posted: 11/22/2018 7:55:26 PM EDT
[#31]
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Posted: 11/24/2018 11:23:30 PM EDT
[#32]
I did a thing. Decided to go with a Maxim PDW stock instead of the SBPDW brace. I’ll Efile the Form 1 and hopefully have it back in a couple weeks.
Total build will look like this: Aero X15 Lower Geissele LPK Larue MBT trigger Maxim PDW stock w/ heavy buffer & tax stamp Aero upper Colt bolt carrier BA bolt KAC trigger Guard KAC ambi safety Ballistic Advantage 12.5” barrel Superlative Arms Adj Gas block Geissele MK4 Federal OD green rail AAC 51T flash hider Vortex PST 1-4x (temp optic until NX-8) PA scope mount |
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Posted: 11/25/2018 12:05:15 PM EDT
[#33]
Quote History |
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Posted: 12/4/2018 11:50:58 PM EDT
[#34]
Waiting on BUIS and LT-204 Mount. NX-8 will come after taxes this year. Until then, the 1-4x Vortex PST will work. Didn’t like the PA ACSS reticle...tip of the chevron isn’t defined enough for precise aiming. Since it was a 7.62x39 reticle I tossed it on my CZ 527M in the same caliber.
Gonna shooot it to 1000 over a chrono shortly so I’ll compare some velocities with what’s been posted here. ETA: Updated with completed SBR.  Attached File |
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Posted: 12/5/2018 2:01:40 AM EDT
[#35]
Got some 107gr smk bullets today, hopefully I'll get to load them up and test them out of my 12" Grendel.
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Posted: 12/6/2018 12:03:41 AM EDT
[#36]
New barrel installed...Let's see how she does this weekend.
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Posted: 12/9/2018 7:58:49 PM EDT
[#37]
I’ve got a BA 12.5” barrel on the way along with a PSA LPK with SBA3 stock, 500 rounds of wolf and an Aero M4E1 upper and handguard. I don’t know why I’ve been ignoring the Grendel for years but I’m excited to build one now.
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Posted: 12/12/2018 1:09:11 AM EDT
[#38]
Quote HistoryQuoted:
Ended up with a Geissele MK4 Federal 10" rail. Went with this scope... https://www.AR15.Com/media/mediaFiles/2980/A753A0B4-1B3A-49D4-9107-15282711DCF6_png-747754.JPG |
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Posted: 12/12/2018 1:14:10 AM EDT
[#39]
Quote HistoryQuoted:
Built a grey ar15 in grendal because of this scope. It has a 16 inch faxon gunner barrel in it. So very happy with America gunner and eld match ammo. It ended up on this instead...  Attached File |
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Posted: 12/12/2018 2:39:44 AM EDT
[#40]
Does anyone have any real accuracy reports from the 12.5 Ballistic Advantage / Aero barrels? Seems like every rifle on the internet is “sub MOA all day when I do my part” and I’d love to get some feedback from LRRPF or others that actually get out and shoot.
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Posted: 12/12/2018 11:08:10 AM EDT
[#41]
Quote HistoryQuoted:
Does anyone have any real accuracy reports from the 12.5 Ballistic Advantage / Aero barrels? Seems like every rifle on the internet is “sub MOA all day when I do my part” and I’d love to get some feedback from LRRPF or others that actually get out and shoot. |
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Posted: 12/12/2018 12:15:14 PM EDT
[#42]
Quote HistoryQuoted:
Does anyone have any real accuracy reports from the 12.5 Ballistic Advantage / Aero barrels? Seems like every rifle on the internet is “sub MOA all day when I do my part” and I’d love to get some feedback from LRRPF or others that actually get out and shoot. |
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Posted: 12/12/2018 12:40:20 PM EDT
[#43]
After reading this thread, I'm thinking I can dump my .300blk and 6.8 SPC and replace both with 6.5 Grendel. Any idea what kind of energy a 6.5G can have out to 300yds? I built the 6.8 for hogs but would like a caliber I can use on hogs and long range target shooting and it looks like 6.5G would fit that bill.
Thanks for all the great info in this thread! |
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Posted: 12/12/2018 2:33:58 PM EDT
[#44]
From previous post. 12" 6.5 vs 16" 7.62x39
 Attached File |
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Posted: 12/12/2018 2:43:06 PM EDT
[#45]
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Posted: 12/13/2018 11:05:11 AM EDT
[#46]
Quote HistoryQuoted:
Does anyone have any real accuracy reports from the 12.5 Ballistic Advantage / Aero barrels? Seems like every rifle on the internet is “sub MOA all day when I do my part” and I’d love to get some feedback from LRRPF or others that actually get out and shoot. We'll see! |
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Posted: 12/13/2018 11:52:10 PM EDT
[#47]
Quote HistoryQuoted:
Does anyone have any real accuracy reports from the 12.5 Ballistic Advantage / Aero barrels? Seems like every rifle on the internet is “sub MOA all day when I do my part” and I’d love to get some feedback from LRRPF or others that actually get out and shoot. Just my .02 worth |
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Posted: 12/18/2018 8:34:46 AM EDT
[#48]
Quote HistoryDeleted...Started a new post, didn't want to hi jack OP's post 
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Posted: 1/1/2019 4:40:08 PM EDT
[#49]
@LRRPF52 I have been looking for the ar15 accurizing thread that was here. I thought I had bookmarked it. Do you have a link for it
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Posted: 1/1/2019 5:28:25 PM EDT
[#50]
Quote HistoryQuoted:
@LRRPF52 I have been looking for the ar15 accurizing thread that was here. I thought I had bookmarked it. Do you have a link for it |
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