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  #1  
Old 06-24-2006, 02:48 PM
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6.5 Grendel vs 6.8 SPC


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I am looking for a long range shooter on a AR platform (my first AR). I could be interested in a 6.5 x 284 in a bolt action too. I want to hit targets, predators,and varmints at long ranges. What say this board on their experiences?
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  #2  
Old 06-24-2006, 03:20 PM
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Have no idea what an AR-15 in 6.5 Grendel or 6.8 SPC would do, but believe you would be most happy with the 6.5/284 combo. Have a 6mmk/284 and am quite pleased with it.
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  #3  
Old 06-24-2006, 07:25 PM
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On Fathers' Day I fired a 6.8 SPC that a friend had assembled. Shooting was from the bench at 100 yds. using a bipod. Recoil was slight. I pulled one out of the group on top of being totally unfamiliar with the rifle/scope/two-stage match trigger but still managed about 1.25". He shot some 5-shot groups right at 1". It definately has potential.
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  #4  
Old 06-25-2006, 12:24 AM
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Complete AR-15 uppers are/were available for the 223 WSSM, 243 WSSM and 25 WSSM. Been waiting for a 6.5 or 264 WSSM but don't think it is going to happen.
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  #5  
Old 06-25-2006, 02:57 PM
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Nitro
I asked Bushmaster about a 6.5 and they have no plans for one. They are coming out maybe Aug. with a 6.8 SPC. I am pretty green on AR's, but how does one match up one of your mentioned uppers with a lower? Say 223 vs 243 the magazines would be of different sizes, or would they?
Jim
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  #6  
Old 06-26-2006, 03:18 AM
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Jim,

Define long range for you, 300, 500. 1000m? The 6.5 Grendel was designed for long range with a good BC and to punch paper. The 6.8 SPC was designed as a assualt rifle cartridge with a 300m range. Both are designed from the ground up to work within the AR which would require another upper, bolt and magazine (you can fit 6-7 rds in a 30 rd M16 mag). There is allot of info on the two over at www.AR15.com Believe mags are the same for the WSM cartridges but of limited capacity. Lowers are all was the same for that's the advantage of the AR being moduliar, push pins out and swap uppers.

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Last edited by Combat Diver; 06-26-2006 at 03:21 AM.
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  #7  
Old 06-27-2006, 05:07 PM
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CD
Our range has a max of 600 yds and that would be for me too. I have a 223,243,7mag and 338 mag all bolts. There was an article in Guns & Ammo on the DPMS 260 that got my attention as I have always thought about the black rifle. Then in search I picked up some neg input on DPMS product and C/S. Bushmaster has no plans for a 6.5 but will come out with the 6.8. Got a call?
Jim
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  #8  
Old 06-29-2006, 02:49 AM
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Ar-15 6.8 Spc

Quote:
Originally Posted by Jim n Iowa
Nitro
I asked Bushmaster about a 6.5 and they have no plans for one. They are coming out maybe Aug. with a 6.8 SPC. I am pretty green on AR's, but how does one match up one of your mentioned uppers with a lower? Say 223 vs 243 the magazines would be of different sizes, or would they?
Jim
.

Jim,

Sorry for the slow response but Combat Driver's reply should answer your questions. Thanks CB.

Here's an interesting and informative link on the subject:

www.demigod.org/~zak/firearms/6.8SPC/faq.php .
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Last edited by NITRO; 06-29-2006 at 03:16 AM. Reason: ADDED LINK
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  #9  
Old 06-29-2006, 04:33 PM
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Thanks for the education on AR's. So if uppers can be changed out with one lower (using different cal. ie: 223 vs 6.5) how does the lower accommodate the different size in cases, or is there just one size clip used for different case's? What is the recommended lower brand? Bear with me here I may go to the Dark Side.
Jim
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  #10  
Old 07-19-2008, 04:53 PM
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Good Evening Gentlemen,

The AR platform is truly an interesting system. At this time there seems to be 3 distinct varients. The AR10, AR15, and for want of a better description The AR WSSM ( from Olympic Arms )

The AR10 will handle cases in the .308 Win class and the WSM class.
. The difference being case head diameter .You must use different bolt face bolts. The feed ramps in the barrel extension and upper need to be the correct angle and
must be adjusted to suit the cartrige and bullet combination.

The AR15 with the standard bolt and carrier can be configured to handle case head sizes .378 (.223 case size ) to .473 or ( .308 case head size ) The bolt face is opened up to accomidate the case head size. Case length must be adjusted to fit the magazine. This gives you such scases as the .223 series , the PPC series, Remington BR, series. You can also use the rebated rim cases such as the .284 Winchester ( again we are limited to a length to fit the magazine ) . The rebated rim cases allow such rounds as .450 Bushmaster, .458 SOCOM, and .500 Beowolf (Alexander Arms).

There are specific magazines for the various case bodies. ( These have the specific case lip angle and follower to accomidate the many different rounds )


Then we have the AR WSSM. I have not yet assembled one. I have the specific barrel extension and bolt ( both are larger than AR15 parts but smaller than AR10 parts ). I suspect the bolt carrier is different also. At least it would have a larger bore for the bolt.If you are interested in this varrient contact Olympic Arms.


When selecting an AR rifle you need to be specific. You need to ask yourself what you intend to hunt. Do you want an ( F class 1000 yard match rifle ) Do I want to hunt ferral hogs. Do I want a CQB battle rifle. What range do I intend to enguage my target and how much retained energy do I need to plant my target where it stands.


Then we can have .22 rimfire varients.


There are many upper varients for the specific rifle. You can have several uppers which fit on one lower


Then there are the pistol varients and all the different calibers.


AR rifles and pistols are like POTATO CHIPS one is never enough.


If I can be helpful you may contact me at

[email protected]


Thanx,

Ron
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  #11  
Old 07-19-2008, 07:06 PM
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I think that it is DPMS, it may be Stag, but they make em in the complete 308 family....243, or even better .260...the most accurate commercial cartridge.
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  #12  
Old 07-19-2008, 11:31 PM
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DPMS has the full 308 family, 243, 260, 308, 338 Federal and the new 6.5 Creedmoor. The 260 would be great for long range in an AR, though from the original question, two years ago, the 6.5 Grendel would be the better than the 6.8 SPC at extended ranges, due mainly to the higher BCs of the bullets. The domain of the 6.8, as mentioned, is mainly under 300 yards as an improvement over the 223. The 260 and 6.5 Creedmoor would outperform the 6.5 Grendel, though then you are stepping up in weight and size to the AR10 platform.

In the end there are so many variants for the AR that you could spend a lot of time trying to figure which one fit what need.
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  #13  
Old 07-22-2008, 09:25 AM
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I have a 6.8 and it's going to be used for hunting, think of it as a 270 short. it shoots 270 bullets (mostly in the 110g weight) at a few hundred feet per second slower
there's plenty of guys using them to hunt deer, hogs and bear even..,
mine is sub MOA with a 3x ACOG
if primary use is indeed longer target stuff the Grendel may be the better choice

my baby:
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  #14  
Old 07-22-2008, 03:16 PM
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Great looking rifle!! I would say that the 6.8 could be used for deer just fine. I think I remember reading that the 6.5 Grendel stays supersonic out past 1000 yards. The 6.8 may not do that, but at normal hunting distances it should be fine. Let us know how it works out if you take an animal with it. I would be very interested in hearing the actual performance.
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  #15  
Old 07-24-2008, 05:37 PM
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thanks
will be involved in some testing in a few weeks
here's some pics of successful 6.8 users
http://cardinalarmory.com/cardarm-pc....asp?idpage=11
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  #16  
Old 08-01-2008, 04:24 PM
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Sorry, been busy. As Ron mentioned there are several different size AR for different cartridge lengths (like bolt action rifles) The most numberous is of course the AR15 designed around the 223 Rem/5.56mm cartridge. I enjoy shooting iron sights with the rifle and carbine out to 500 yds with them. One thing to match is your barrel twist and bullet weight/length. If your planning on small targets then go with a flat top reciever to lower your scope (this also makes scoping easier) and pick a good cartridge.

CD
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