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#2247883 - 07/10/12 10:40 PM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: dcase]
Bax Offline
Die Hard Member

Registered: 11/21/10
Posts: 656
Loc: Murray, UT
But here is one other option to consider:


It has an ER Shaw barrel on it and will save you some green if you want to be sure that this is the right caliber for you
Light does travel faster than sound. This is proven by people that seem bright until you hear them speak.

#2782022 - 01/19/15 11:49 PM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: Varminterror]
Yoda-X Offline
Seasoned Member

Registered: 11/08/14
Posts: 105
Loc: Western US

Well said!! While I am on the 6.5 grendal bandwagon right now, I agree that both have their merits in an AR platform. Pick one and be happy!

Originally Posted By: Varminterror
The guys that spent money chasing 6.5's around have always needed a reason to claim it was superior to the more widely available 6.8's. Sure, better BC's, good on ya, but frankly, there isn't enough difference for anyone to care. It's a .270win vs. .308win debate for a whole new generation.

Some universal truths that I have seen in shooting both of these:

1) Neither is what ANYONE that actually shoots 1,000yrds would call "good for 1,000yrds", so discussing the performance at 1,000yrds is moot. If you can dope a a 6.5, you can dope a 6.8 to 1,000yrds, and neither should be your first choice anyway.

2) Either will kill a coyote to 600 without issue, farther if you can get the bullet there. Most guys can't shoot an AR well to 600yrds, and if you're talking a bolt gun, then you're dumb for owning a boltgun in either of these cartridges.

3) Either will kill a deer cleanly to 400-500yrds, but NEITHER is a good choice for 600yrd deer hunting. The energy of BOTH has dropped low enough at 600yrds that you're talking about a VERY marginal cartridge.

4) Either of them really needs to be reloaded to optimize/maximize performance. The factory loads for both rounds are rather modestly loaded. In general, factory ammo for the 6.8spc can be found anywhere in the country, but it IS scarce, and there won't be much selection. Factory ammo for the 6.5 is more scarce. I have seen several stores around the country that carried 6.8 and not 6.5, and I hae seen several stores that carry both, but have yet to see a store that carried 6.5 and did not have 6.8. Where there is 6.5, there is 6.8, but the reverse is not necessarily true.

5) Both have NON-CARTRIDGE-SPECIFIC length issues. Unless you have a .264LBC chamber, you'll want longer throat in a standard 6.5 G, and you'll want longer mags in a 6.8. This isn't specific to either cartridge, it's just a factor of AR-15's. They're very short actions and magazines. Long .223's have issues, the WSSM's have issues, etc etc.

6) Most importantly, nobody really cares anymore. It's 6 of one and half a dozen of the other. Pick which one you want and get on with your day.

#2782095 - 01/20/15 07:17 AM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: dcase]
kymailman98 Offline
Die Hard Member III

Registered: 12/14/08
Posts: 2755
Loc: Western Kentucky
I do shoot the 6.8 SPC and it's proven fine for deer and coyotes at the ranges at which I normally shoot. I've never shot the 6.5 Grendel, and probably never will. This is a little like the old Ford versus Chevy argument, and I say whatever trips your trigger is the way to go. The original post compared the 6.8 and 6.5, along with the 308, and that's like comparing apples and oranges. The 308 would be a far superior round than either of those two, and there's really no comparison. Now, having said all that, if I want long range performance, I'm going to be shooting a bolt action rifle, and probably using different cartridges, although the 308 would definitely work.

#2783199 - 01/21/15 07:54 PM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: dcase]
6.5gren Offline
Predator Master

Registered: 12/22/13
Posts: 93
Loc: Virginia
I am sure someone will disagree but I am sure you can make a lighter ar(6.5 or 6.8) than any .308. That being said if you do applets to apples (barrel length& comparable loads) the 6.5 will be a clear winner once you pass 4-500 yds.

#2784637 - 01/23/15 09:36 PM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: dcase]
17tactical Offline
Die Hard Member II

Registered: 07/03/09
Posts: 1675
Loc: Westchester County, NY, USA
I too had this decision to make, I even had the opportunity to load, shoot and hunt with all three... in the end the Grendel won..

#2790818 - 02/02/15 11:38 AM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: dcase]
moonshine44 Offline
Die Hard Member II

Registered: 04/20/01
Posts: 1370
Loc: The wilds of eastern Oregon...
And besides which, the name "6.5 Grendel" just sounds much more cool than "6.8 SPC". laugh

Seriously, I've had the Grendel bug for a couple of years (it's been in remission but is starting to come back to life), but have never really considered the 6.8 until now. I think I'll do some more researching before I start building, but then again there's that name...

If it ain't fun, why do it?

#2790862 - 02/02/15 01:04 PM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: dcase]
berrnard Offline
New Member

Registered: 01/28/15
Posts: 21
Loc: IN
for me it comes to yards and availability.

where i hunt, a 300 yard shot is unheard of - so grendel and spc are neck and neck
10x more things are available in spc so that is what i am leaning towards.
plus who cares that you have a 308? people perk up when you have an "odd" cartridge

and i don't want the weight of a ar10
“The joke was that President Bush only declared war when Starbucks was hit. You can mess with the U.N. all you want, but when you start interfering with the right to get caffeinated, someone has to pay.” -Chris Kyle

#2791132 - 02/02/15 08:56 PM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: berrnard]
cmatera Offline
Die Hard Member III

Registered: 12/15/08
Posts: 2256
Loc: CO
I just got into a .264 LBC only because I happened on a brand new BHW AR barrel. Picked up a 7.62 x 39 BCG. Only thing specific I need is dies & a mag. Everything else is standard AR15 stuff. Went to my LGS, lo and behold found 150 pcs of 6.5 Grendel brass. I too have zero interest in the weight of an AR 10 or the brass forming hassles of the WSSM's. Like many, just trying to get all I can out of the AR15 platform. Sometimes, the decision gets made for you.

#2850613 - 08/03/15 08:49 PM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: dcase]
JPShooter Offline
New Member

Registered: 08/03/15
Posts: 6
Loc: Idaho
This thread has been going for some time now! So here's to keeping a dying horse up and running smile

I just sold my AR10 .308 in order to fund a Grendel build. I'm in N. Idaho and intend to hunt wolves this year with an AR. The .308 was just too heavy for a hunting rifle. Sniper's will carry big heavy rifles, but that's a different game. For a hunting AR I decided that the Grendel was the sweet spot between the anemic (at longer ranges on game) 5.56 and the heavier but harder hitting .308 in the AR10 platform. I'll be keeping my bolt .308 for long range plinking.

The Grendel will never replace the .308 ballistically, but guns are like optics, it's all about compromise.

If I want to chase some elk, it's going to be my .300wm, and not my Grendel. But there's just something about the AR that makes me smile, and that's why I want to hunt with it. Then again, I really like my Marlin Cowboy 45-70 with it's 26" long octagon barrel, but that's a whole other story. smile

Horses for courses I've heard said, and I think that sums it up well.

#2850616 - 08/03/15 09:04 PM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: dcase]
Eugene Canterbury Offline
Die Hard Member II

Registered: 11/24/14
Posts: 1141
Loc: AL / WI
The 6x6.8 sure is a neat round though also. Mostly if you reload though. There seems to be only one place that makes a factory specif 6x6.8 round.
"I used some guesswork and unscientifically extrapolated that there is significant support for a blanket ban right now."

#2851840 - 08/08/15 10:43 PM Re: 6.5 Grendel vs. 6.8 SPC vs. .308 [Re: dcase]
San Antonio FJ Offline
New Member

Registered: 03/30/15
Posts: 7
Loc: TX

Couldn't decide so I built both, both 20" barrels 6.8 is and ARP barrel and 6.5 is a BHW. My 6.5 seems to shoot better groups, but I havent found my load for the 6.8 although 90gr speer HP shoot pretty good

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