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Old November 29, 2017, 10:24 PM   #1
ADIDAS69
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Just a simple vote

So there are I am sure very solid opinions on the following question, if you please anyone who’d like to rank the following choices assuming a 16” barrel AR platform. 6.8 SPC, 6.5 Grendel, or 300 AAC Blackout? No explanations necessary. I swore I’d never buy a boutique caliber, but here we are. Note that I know some of you will be irked at my use of the word boutique, well it’s true.
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Old November 29, 2017, 10:27 PM   #2
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Without knowing what you plan to use the rifle for, no useful answers will come.
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Old November 29, 2017, 10:44 PM   #3
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I will be specific in my response, I have four AR.’s in other than 5.56, Two pistols (8.5” & 12.5”) and two Carbines all are used for plinking and other recreational shooting. My bolt action Ruger Ranch and AAC Handi Rifle are used on Texas hogs. All six are chambered in 300 Blackout and supersonic ammo.
I love the caliber and love shooting it, I have taken hogs over 350# with a single shot and 125 grains of .308 bullet so for me it, 300 BO, is a keeper.
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Old November 29, 2017, 10:49 PM   #4
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All of those calibers serve very different roles.

If all you want is something different, any one of them would work...


If you hunt, the 6.8 is great for typical deer distances, out to a few hundred yards.

Suppressed... 300blk... Its also good for deer and hogs out to 100-150yds with proper bullet selection.

Long range precision shooting... 6.5 is good option, as it has better down range performance. It is also suitable for hunting, and can push the effective range out longer than the others... But most hunters do not need this increased effective range... Between the three, it is the hardest to source ammo for, so I would not choose it as a simple hunting caliber.
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Old November 29, 2017, 11:08 PM   #5
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Sharkbite, I’d agree but I already know the pros and cons of the suggest cartridges and it doesn’t matter which one I choose. I’m trying to avoid my practical instincts and go with 300 BO. Really I was hoping for a flood of people voting for 6.8 SPC, cause reasons.
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Old November 29, 2017, 11:29 PM   #6
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If I don’t get enough input I’ll do something really dumb and go with 50 Beowulf
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Old November 30, 2017, 12:05 AM   #7
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Quote:
If I don’t get enough input I’ll do something really dumb and go with 50 Beowulf
Quote:
If all you want is something different, any one of them would work...
I think you answered your own question...
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Old November 30, 2017, 12:07 AM   #8
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If you handload, the Grendel is an incredible cartridge/platform combination.

01/23/12


Very little can touch it for getting the absolute MAX out of the standard AR receiver design
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Old November 30, 2017, 12:22 AM   #9
ADIDAS69
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My main issue is that it’s possible I’ve gone off the handle at my local firearms retailer angrily spouting off about why I don’t like other than 5.56/223 or why not grow a pair and use .308 (AR10); so if I go down and pick out an oddball upper to go with my orphaned rifle lower I’m gunna catch a lot of grief. Well deserved, but still. I could go with a pistol caliber but unless it’s 10mm who cares.
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Old November 30, 2017, 12:23 AM   #10
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Mehavey, what’s the yardage on that group?
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Old November 30, 2017, 12:24 AM   #11
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Can you still mag feed with that load?
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Old November 30, 2017, 07:46 AM   #12
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Yardage: 100 yds
OAL: 2.26" (standard Mag Length & Feed. In fact I use ordinary AR 223/5.56 mags w/o problem)

You still need the full standard-lower gun complement though:

- 223/5.56
- GRENDEL
- Woof

with those... who needs a 308? (...asked my wife.... to no avail )
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Old November 30, 2017, 08:28 AM   #13
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Hunting use w/16" barrel:
6.8 SPC
6.5 G
300 AAC

you specified no explanation so none offered.
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Old November 30, 2017, 08:43 AM   #14
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I have 6.8 SPC, 6.5 Grendel and .50 Beowulf.

The AA Grendel with 19" barrel is VERY accurate. After I sighted it in, I was able to touch off two cans of Tannerite at 150 yds, standing off-hand with one shot each. I haven't taken any game with it yet, but some members here have had very good luck with the caliber on deer at fairly long ranges.

The Beowulf is accurate as well, and a serious thumper on pigs. It also has very impressive recoil compared to the other two.

Don't have a .300BLK
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Old November 30, 2017, 09:45 AM   #15
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If you are wanting 6.8 or 50beo... Then get one of those.
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Old November 30, 2017, 10:15 AM   #16
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If I were buying an AR in anything other than 223/5.56 it would be something in 6.5.
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Old November 30, 2017, 02:28 PM   #17
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Quote:
Hunting use w/16" barrel:
6.8 SPC
6.5 G
300 AAC

you specified no explanation so none offered.
Pretty much my vote, as well. But scratch the .300 Blk completely.
Sure, it'll work; but I'm not going to hunt with one. I'd rather just run .223 with 53 gr TSXs.

But, even then... Since there's no specific type of hunting, or selection of species to consider, it's possible that none of the above would make the cut for me.
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Old November 30, 2017, 02:45 PM   #18
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You can successfully hunt with .223 if you stay within its parameters for effective use. I did it for a long time.
I have taken a break from hunting, but I put together a 6.8 for when I return to hunting. I haven’t used it yet, but I selected 6.8 after much research and consulting TFL ... but that was me. 6.5 would have worked as well or better probably. Parts and ammo availability at the time tipped the scale in favor of 6.8 at the time, but it could have easily been tipped towards 6.5.
I’m no expert on any of them though. So I’ve contributed without explanation... in a way, lol
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Old November 30, 2017, 09:54 PM   #19
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6.8. Works great from short barrels. If you want sub/sup Bison makes a barrel that does that. Otherwise ARP barrels are the heat.
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Old December 1, 2017, 06:10 PM   #20
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I have: 5.56mm and 300 Blk

I will soon build: 6.5 Grendel and or 450 Bushmaster.

It really matters what it's for and if you are a hand loader or not. The advantage to 300 Blk is almost free brass converted from 5.56mm range or once fired bulk. The cost of brass is gonna be a thing with the other calibers so they will be for match use or hunting mostly.

6.5 Grendel MIGHT allow you the option of WOLF steel cased ammo for plinking but I have heard mixed results on reliability in the AR. If it was reliable, you could use the steel surplus for plinking and load up some hand loaded hunting ammo in nice brass.

450 Bushmaster: very cool, I love 45 anything, and more powerful than the others but will have range limitations vs the others and brass is a problem.

The 6.8 is a good cartridge but i think the 6.5 Grendel makes it obsolete. (I know, I know)

Good Luck!
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Old December 2, 2017, 01:30 AM   #21
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My brother has a 300 Blackout AR. With 125 BT Noslers it is fairly impressive out to 200 yards. The farthest that I have worked with it to date.
I have a 6.8 die set, but I have not put an upper together to shoot 6.8's so far.
My only non 223 AR, other than my Tactical Solutions 22 LR build is a 26" 204 Ruger set up to shoot 40's. It is pretty impressive out to 600 yards.

Bob
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Old December 2, 2017, 05:28 PM   #22
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For an obsolete cartridge, the 6.8 continues to be a very popular cartridge. And with all the wildcats out there plus new ones coming out based on the 6.8 case, it'll be around for a long time. Compared to the 6.5 Grendel, both are good for hunting out to 400 yards. No matter how the Grendel crowd likes to spin it, the 6.8 trumps the 6.5 Grendel in a SBR. You'll also likely pay a little more for a quality Grendel build compared to a 6.8. The only real advantages for the Grendel is the availability of cheap steal case Wolf ammo. But that ammo is not very accurate. Ammo for both cartridges is usually carried by large retailers. If you reload, none of that matters. If going with a SBR or 16" or less on the barrel, I go with 6.8. If punching paper at longer ranges with a longer barrel, I pick the 6.5 Grendel. But both will do both jobs reasonably well. Both are accurate cartridges. All of my 6.8 shoot .5" MOA.

If you like punching paper suppressed, the 300BLK is nice. But for hunting, the 6.8 and 6.5 Grendel are better choices.

Last edited by ed308; December 4, 2017 at 12:26 AM.
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Old December 3, 2017, 06:32 PM   #23
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Anybody got a read on Blackstone re quality of barrels?
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Old December 3, 2017, 09:55 PM   #24
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6.8 SPC
6.5 Grendel
300 AAC Blackout
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Old December 3, 2017, 10:00 PM   #25
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^
^
^
I vote identically.
I agree with Ed308 100%
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