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View Full Version : 6.8... how's it doing?


Maximusmax51
05-13-2010, 2:44 PM
So now that the big 6.8 argument/debate/end all be all has died down, how is the round doing (only for people who have it, shoot, or actually know facts)? Really looking into picking up a new upper for my hard work, and finally getting back into school. Just a little present/ pat on the back for myself hahah.

Looking for specs on barrel lengths, and manufactures to go through.
Thanks for the info gents.

Ed.
05-13-2010, 3:39 PM
I have an LWRC 6.8 M6A3 and I love it.

cmace22
05-13-2010, 3:43 PM
All I have to do to answer that question for myself is look at ammo costs....... I loved my 6.8 but sold it due to ammo availability and cost. Im sure the round is doing great for people with deep pockets or reloaders. You may want to check out 6.8forums.net I believe.

Maximusmax51
05-13-2010, 3:54 PM
Eh I like Calguns better hahah. I hate how everything for this wonderful passion comes down to $$. Is what it is I guess.

But to ed... what do you like about it? Other than it being a top notch upper!

cmace22
05-13-2010, 3:58 PM
I had an early attempt at 6.8 upper. I like the idea of the round itself. Harder hitter, larger round, almost the same mag capacity.

Jpach
05-13-2010, 4:19 PM
6.8 is pretty cool. Reloading is a must.

gun toting monkeyboy
05-13-2010, 4:43 PM
I reload, so ammo availability isn't as big of a deal for me. But the cost of reloading supplies is. I can get 6.8 brass pretty easily, and fairly inexpensively. Not .223 cheap, mind you. But on par with many of the other rifles I load. The 6.5 was too rich for my blood. I have a JD Machine upper with a Bison Armory 18" barrel, and I have been pretty happy with it. I would probably go with the 16" barrel if I did it again. It shoots well, groups well, and has only a little more recoil than the .223/5.56 does. It is pretty close to my 7.62x39. If you are looking for a solid medium game rifle out to 300 yards, 6.8 is hard to beat on an AR platform.

-Mb

Sarkoon
05-13-2010, 4:48 PM
When 6.8 PMAGs hit the market, you'll know that 6.8 has really caught on. That and 6.8 barrels and bolts for the ACR. Those are the things I'm waiting for, and I actually wouldn't be surprised to see all that stuff available in 6-12 months.

2Cute2Shoot
05-13-2010, 4:53 PM
I would love to upgrade to 6.8, but I have about 4,000 reloaded rounds of .223, so I think I will be staying with that for now. But every time I look at the holes in my targets, I always think "those are so tiny" :(

Super Spy
05-13-2010, 5:03 PM
I wanted a 6.8 but I'm working on .308 instead. 308 ammo is much more widely available and less expensive. I already have 2 IRA lowers and an LPK. Sure the upfront costs on 6.8 would be less......but longer term the 308 has it's payoff. If I had the funds I'd probably have both.

Maximusmax51
05-13-2010, 6:11 PM
so JD does make a upper?!!! Anyone know if they'll be at the gunshow with uppers to sell? price? I've got the itch BAD!

SDlocal
05-13-2010, 6:58 PM
If you want a 6.8 go with AR Performance or Bison. I have a 6.8 match barrel from ARP and it is the shiznit. Reloading is the way to go I can push a barnes 95gr TTSX @ 3050fps that's a whole lot of beat down for something 300 yards and in.

Bug Splat
05-13-2010, 7:56 PM
6.5G is better :D

Now let me just slip on this flame suit....:95:

Maximusmax51
05-14-2010, 12:56 PM
So I'm thinking ar performance: 16" match flutted w/ pws flash, and DD 9" rail... I'm in love

stormy_clothing
05-14-2010, 1:05 PM
for a buck a round I'd stick to match grade 308 or basic 338 lapua - if I was going to stick to a m4 converted I think 6.5mm is better

MissionMTMan
05-14-2010, 1:14 PM
I don't understand why people want the 6.8spc (unless you're doing an SBR, but you aren't cause you are CA.) Get the 6.5 Grendel and never look back. If you know anything about ballistics, you will see that the 6.5 Grendel is hands down a lot better cartridge.

The Duke
05-14-2010, 1:18 PM
I don't think the price of over the counter ammo has come down much at all. I've been watching this as I'd love to do some AR hunting, but for some unknown reason, it's not catching on. Weird as it is such a great all purpose round that makes a ton of sense.

Vtec44
05-14-2010, 1:24 PM
I don't understand why people want the 6.8spc (unless you're doing an SBR, but you aren't cause you are CA.) Get the 6.5 Grendel and never look back. If you know anything about ballistics, you will see that the 6.5 Grendel is hands down a lot better cartridge.

What's the comparison between 6.5G and 6.8SPC when using a 14.5 barrel?

kblack583
05-14-2010, 8:33 PM
I don't understand why people want the 6.8spc (unless you're doing an SBR, but you aren't cause you are CA.) Get the 6.5 Grendel and never look back. If you know anything about ballistics, you will see that the 6.5 Grendel is hands down a lot better cartridge.

Shouldnt you clarify that the 6.5g needs distance to take advantage of its higher bc bullets and excercise its "hands down" better ballistics? In fact, out of a 16" barrel at 300 yards the 6.8SPC is right there with the 6.5G with factory loads and well past with hand loads.

As far as not understanding why people want it? Lets see substantially more vendors of ammo and uppers sounds like very good reasons.

kblack583
05-14-2010, 8:42 PM
I don't understand why people want the 6.8spc (unless you're doing an SBR, but you aren't cause you are CA.) Get the 6.5 Grendel and never look back. If you know anything about ballistics, you will see that the 6.5 Grendel is hands down a lot better cartridge.

What's the comparison between 6.5G and 6.8SPC when using a 14.5 barrel?

Here's some info for a 16" barrel.

6.5 ******* using Bill's max loads in a 16" barrel- zeroed at 200yds drops at 300yds.
due to energy being less than 1000ft lbs 300 yds is about max for taking deer or hogs.
the same temp, pressure line of sight and program used to figure all drops in both calibers.
100 Nosler-2600fps--drop 9.4/801 ft lbs
107 SMK-2545fps-----drop9.5/878ft lbs
123 SMK-2472fps----drop 9.4/1083ft lbs
120TSX-2472fps----drop9.8/984ft lbs

6.8 SPC SSA factory ammo 16" barrel
100 Nosler-2700fps--drop9.0/809ft lbs
110 Nosler-2630fps--drop9.0/939ft lbs

6.8 handloads max
100 Nosler 2950fps---drop 7.4/993ftlbs
110 Nosler 2750fps--drop8.2/1040ftlbs

6.5 ******* using Bill's max loads in a 16" barrel- zeroed at 200yds drops at 300yds.
due to energy being less than 1000ft lbs 300 yds is about max for taking deer or hogs.
the same temp, pressure line of sight and program used to figure all drops in both calibers.
100 Nosler-2600fps--drop 9.4/801 ft lbs
107 SMK-2545fps-----drop9.5/878ft lbs
123 SMK-2472fps----drop 9.4/1083ft lbs
120TSX-2472fps----drop9.8/984ft lbs

6.8 SPC SSA factory ammo 16" barrel
100 Nosler-2700fps--drop9.0/809ft lbs
110 Nosler-2630fps--drop9.0/939ft lbs
110TSX-2630fps---drop 9.5/856ft lbs ------added
6.8 handloads max
100 Nosler 2950fps---drop 7.4/993ftlbs
110 Nosler 2750fps--drop8.2/1040ftlbs

Vtec44
05-14-2010, 9:04 PM
Here's some info for a 16" barrel.



Thanks. I was hoping for 14.5" data but I guess that will do. I'm building a 14.5" 6.8 but may just stick with 16"

Eight O Clock
05-14-2010, 10:16 PM
Wasnt there some talk/hope/belief that the military was going to replace the .223 with the 6.8 spc ? I saw somewhere that the military was doing testing with the Barrett M468 in Iraq and Afghanistan to see how viable it was to replace the .223

It sure sounds like it would be a better round for combat.

Rust
05-15-2010, 12:17 AM
I don't understand why someone in CA would build a 14.5 inch rifle. You're going to have to pin an oversize break on there anyway. Why give up the velocity? If you want to keep it as compact as possible then have some one cut you a 15" and pin a standard break on it. Why limit yourself and your rifles capabilities?

Dump1567
05-15-2010, 10:17 AM
6.8 is also a good choice for an AR pistol round.;)

Downside is factory ammo is about a $1.00 a round.

Here's a good read:
http://www.dtic.mil/ndia/2008Intl/Roberts.pdf (http://www.dtic.mil/ndia/2008Intl/Roberts.pdf)

Looking for specs on barrel lengths, and manufactures to go through.


If your willing to spend the money, Noveske.

Vtec44
05-15-2010, 2:17 PM
I don't understand why someone in CA would build a 14.5 inch rifle. You're going to have to pin an oversize break on there anyway. Why give up the velocity? If you want to keep it as compact as possible then have some one cut you a 15" and pin a standard break on it. Why limit yourself and your rifles capabilities?


Because to each his own, and some people don't want to have all 16" AR's, 18" AR's, 20" AR's.

Super Spy
05-15-2010, 2:34 PM
If you do get a 6.8 SPC, make SURE you get the latest style Chamber. If you buy one from AR-15 Performance I know he makes the correct style. Some of the FUD surrounding the 6.8 is due to a difference in Chamber spec, I think it was a radius on the lead in being different. This makes a fairly big difference in velocity and helps reduce pressure spikes. I'm someone will be along that knows more than me about this, just something to research and know about before buying anything.

1988
05-15-2010, 2:50 PM
I have respect for both 6.8 SPC and 6.5 Grendel.

If you care about longer range ballistics, get the 6.5G. Otherwise, pick whichever is better for your wallet.

MissionMTMan
05-15-2010, 9:21 PM
I agree with you guys on the ballistics. I should have specified which length barrel and what distance you are shooting. I have some 6.8 mags I need to get rid of if anyone needs any.

Maximusmax51
05-16-2010, 12:50 AM
For me it more about the coin. spending the 1000.00 is much easier than spending the 2500.00 just on the ar308. Not to mention then getting the optics to complement it. Already have the 556 w/ a 4x acog. My thought process was " one lower, two uppers". no need for new optics, and mags were interchangeable. But this dollar a round biz is disheartening to say the least! Maybe i should just put the cash on hold and wait.... its's just sooooo hard to do that!

Jpach
05-16-2010, 10:37 AM
For me it more about the coin. spending the 1000.00 is much easier than spending the 2500.00 just on the ar308. Not to mention then getting the optics to complement it. Already have the 556 w/ a 4x acog. My thought process was " one lower, two uppers". no need for new optics, and mags were interchangeable. But this dollar a round biz is disheartening to say the least! Maybe i should just put the cash on hold and wait.... its's just sooooo hard to do that!

6.8 spc is supposed to use different mags than 5.56. But overall, yes, its quite convenient to get an AR-15 upper with an efficient round instead of going with a .308. Depends on what you want to do though.

javalos
05-16-2010, 11:17 AM
I'm hoping the 6.8 SPC will be adopted by the military, our boys need a little more hitting power than the 5.56mm can offer in the war zone, especially in Afghanistan, plus ammo would become more available and cheaper. But we shall see..

gun toting monkeyboy
05-16-2010, 12:02 PM
Ok, first, with the price of ammo; Yes 6.8 is more expensive than .308 surplus ammo right now. But you grendal fans have yet to mention how much your ammo is per box? Why not do an apples to apples comarison of store bought ammo? Oh, wait. You can't, because nobody outside a few specialty vendors carries yours. How about comparing just the brass and dies then? Crap, you run into the same problem... Hmmm... Well, I hate to say it, but that pretty much wraps up the arguement for me. If I can't find brass and dies to reload, and factory ammo costs a testicle, it just doesn't work for me. I can go into a gun store and at least find a box or two of 6.8 ammo on the shelf. It may cast me as much, or a bit more than similar .308 ammo, but at least it is there.

As for the military changing over to it, I don't think that is going to happen. At least not any time soon. We have huge investment in 5.56. Not only in surplus ammo, but in the infrastructure set up to make, maintain and repair all of the weapons we have chambered for it. In our current economic situation, I don't see us spending billions (yes, billions) of dollars to switch over. Or being able to convince all or our NATO allies to do the same. Especially not all the ones that have recently switched over from their old Warsaw Pact weapons systems. You may see some limited use of the 6.8 for specific tasks or missions, but we are stuck with 5.56 for the forseeable future.

-Mb

1988
05-16-2010, 1:40 PM
... I don't see us spending billions (yes, billions) of dollars to switch over. Or being able to convince all or our NATO allies to do the same.


Gov't spending is a classical way to create jobs.... We all might be surprised... ;)

arfan66
05-16-2010, 2:29 PM
I'm hoping the 6.8 SPC will be adopted by the military, our boys need a little more hitting power than the 5.56mm can offer in the war zone, especially in Afghanistan, plus ammo would become more available and cheaper. But we shall see..

While not a primary concern, logistics & budgets will influence future weapon systems employed by the U.S. military. Proof is the USMC choosing SOST 5.56mm ammo vs. switching to 6.8mm SPC. http://www.marinecorpstimes.com/news/2010/02/marine_SOST_ammo_021510w/

Me, I love both of my 6.8 rifles (ARP Xtreme upper & self-built custom upper w/WOA bbl.). Ammo is a non issue since I reload and bought SSA + Remington brass back when it was cheap.

Barrel info - ARP & SPC II chambers can safely handle published max loads. 18" bbls. = 50 - 100 fps more than a 16" bbl. With the right handloads +500m hits are attainable.

My SPR profile stainless WOA bbl is more accurate than my ARP Xtreme bbl. I have to limit my rate of fire to keep the heat down. The ARP bbl. is nitro carburized (melonite) for heavier use, lighter weight and handles better.

6.8 rocks! Good luck choosing your upper!

Maximusmax51
05-17-2010, 8:06 AM
Any of you guys know if there will be any vendors carrying some b****en 6.8 uppers at the del Mar show?

MissionMTMan
05-17-2010, 9:55 AM
Ok, first, with the price of ammo; Yes 6.8 is more expensive than .308 surplus ammo right now. But you grendal fans have yet to mention how much your ammo is per box? Why not do an apples to apples comarison of store bought ammo? Oh, wait. You can't, because nobody outside a few specialty vendors carries yours. How about comparing just the brass and dies then? Crap, you run into the same problem... Hmmm... Well, I hate to say it, but that pretty much wraps up the arguement for me. If I can't find brass and dies to reload, and factory ammo costs a testicle, it just doesn't work for me. I can go into a gun store and at least find a box or two of 6.8 ammo on the shelf. It may cast me as much, or a bit more than similar .308 ammo, but at least it is there.

As for the military changing over to it, I don't think that is going to happen. At least not any time soon. We have huge investment in 5.56. Not only in surplus ammo, but in the infrastructure set up to make, maintain and repair all of the weapons we have chambered for it. In our current economic situation, I don't see us spending billions (yes, billions) of dollars to switch over. Or being able to convince all or our NATO allies to do the same. Especially not all the ones that have recently switched over from their old Warsaw Pact weapons systems. You may see some limited use of the 6.8 for specific tasks or missions, but we are stuck with 5.56 for the forseeable future.

-Mb



Even though I shoot 6.5G, I totally agree with you on that statement. I forgot about the "drought" of 6.5G components. I don't have that problem so I forgot about that. For the distances I like to shoot and my situation, I choose the 6.5 but for many other situations, I can see why you would want the 6.8.

shodog805
05-17-2010, 10:05 AM
i think that this would be great research before choosing an upper. im just about at the same step as the op in getting ready to build my 6.8. a while back i was reading something about pressure diffrences between the saami spec and the one used by RRA which is spec2 if im not mistaken. here is a good thread to look at as well. http://www.thehighroad.org/showthread.php?p=5608742

If you do get a 6.8 SPC, make SURE you get the latest style Chamber. If you buy one from AR-15 Performance I know he makes the correct style. Some of the FUD surrounding the 6.8 is due to a difference in Chamber spec, I think it was a radius on the lead in being different. This makes a fairly big difference in velocity and helps reduce pressure spikes. I'm someone will be along that knows more than me about this, just something to research and know about before buying anything.

gun toting monkeyboy
05-17-2010, 11:00 AM
Even though I shoot 6.5G, I totally agree with you on that statement. I forgot about the "drought" of 6.5G components. I don't have that problem so I forgot about that. For the distances I like to shoot and my situation, I choose the 6.5 but for many other situations, I can see why you would want the 6.8.

Unlike many of the 6.8 crowd, I freely acknowledge that the ballistics of the 6.5 are better. Especially out past 300 yards. But as I said, I can't get the brass or dies easily or consistantly. That pretty much made me a 6.8 person by default. I actually would have preferred to go the 6.5 route, as I reload a LOT of other 6.5 rounds, and have plenty of bullets laying around. And I really, really like 6.5mm. But since I can shoot the 6.8 cheaper, AND I can find brass, AND it will do almost everything the 6.5 will do inside of 300 yards, I'll stick with the 6.8.

Maximusmax51
05-17-2010, 12:45 PM
Now is reloading mostly expensive from the beggining? I want to start but one thing at a time. The 6.8 has some drawbacks but I guess for my sit and already having optics and a lower... better for my $ than spended muho on the 308 or 6.5.

Anyone know the wait time with AR PERFORMANCE?

MissionMTMan
05-17-2010, 1:27 PM
Yes, reloading is a lot more expensive from the beginning. You have to consider it an investment. If you don't reload enough or shoot enough, it may be cheaper for you to go the factory load route and sell the brass. It all depends on how much you are going to shoot and whether you want to put in the time to reload.

THT
05-17-2010, 2:42 PM
Reloading leads to more shooting which leads to more reloading ad infitium :D

nicoroshi
05-17-2010, 2:54 PM
Sorry, double post

nicoroshi
05-17-2010, 2:58 PM
Holding up well. Thanks for asking. :D
I have a 16" SPEC II chambered 1:11.4 twist heavy profiled fluted POF gas piston upper.
I reload (mostly) the 90 gr Speer TNT .277 bullet for it (got a deal on bulk packs a while back).
Shoots like this at 100 yards with me behind the scope off a bipod:

http://img17.imageshack.us/img17/7343/nicegroup.jpg
http://img160.imageshack.us/img160/1212/dscn2944.jpg

Shot a 4.3" 5 shoot group at 300 yards last time in Sac.

Not one I shoot every time out to the range but I still have a lot of fun with her.

http://img24.imageshack.us/img24/5920/dscn2910l.jpg

high_revs
05-17-2010, 3:13 PM
Nico's 6.8 is very sweet! Very nice piece. :)

Jpach
05-17-2010, 3:33 PM
Now is reloading mostly expensive from the beggining? I want to start but one thing at a time. The 6.8 has some drawbacks but I guess for my sit and already having optics and a lower... better for my $ than spended muho on the 308 or 6.5.

Anyone know the wait time with AR PERFORMANCE?

ARP usually isnt too long of a wait. I ordered my upper like a few weeks ago and I think it should be coming this week. Its a 5.56 upper though. Go on the 6.8 forums to find a used one if you need one NOW.

Give ARP a call either way.

SDlocal
05-17-2010, 5:10 PM
+1 give Donna a call at ARP. Now if I was getting something from them I would get one of their new hardened stainless match barrels...it has all the accuracy of SS but the hardness of chrome or nitro carb. Harrison is coming up with some great stuff.

kblack583
05-17-2010, 5:53 PM
+1 give Donna a call at ARP. Now if I was getting something from them I would get one of their new hardened stainless match barrels...it has all the accuracy of SS but the hardness of chrome or nitro carb. Harrison is coming up with some great stuff.

Yeah, been looking at that hardened stainless barrel. Looks like my next next build.