6.8 SPC 6.5 Grendal

@mavracer - ya know, it's funny, I've used StrelokPro for a long time, and I've yet to find the trigger...

Yes, the 6.8's gonna fall transonic before 1,000 with the 120's. Yes, it still runs into the IPSC's I send it after. Just the same as shooting the 6.5 Grendel to 1200.

Yeah, baby the 6.5 Creedmore is proven elk medicine ! And the Ruger American is cheap, works well and can be very accurate.

I could get a bolt gun in 6.5 Creedmoor for about the same money and be able to get better performance in addition to feeding my reloading addiction. Part of the deal is that in my old age my 30/06 is starting to hammer my shoulder.
Sigh getting old sucks.

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Agreed on every point.

<*(((>< said:

Like has been said countless times, not much difference, I picked the one that makes the most sense on design strength, and in my mind the 6.8 SPC II won out. I'll take the 5moa of more drop at 1,000 yards for stronger bolt, magazine feeding, larger entrance wound and larger combustion chamber behind the bigger bore size to get the bullet moving quicker.

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This is the reason I like the 6.8 better; in theory, the design seems less prone to issues (although in practice it probably makes no difference for most). I also would pick something larger if shooting animals way out there so the ballistic coefficient battles don't make a giant difference.

CoalTrain49 said:

Look at the shoulder angle difference. 30° (Grendel) vs 23° (6.8). That should be all you need to know if you want to use the cartridge in an AR.

23° is the same as 5.56 x 45 and there's a real good reason for that.

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So there are bad reports on the Grendel in AR's?

6.8SPCII or 6.5 Gren, both are good rounds, both are interested rounds in their own respects.

Varminterror said:

@mavracer - ya know, it's funny, I've used StrelokPro for a long time, and I've yet to find the trigger...

Yes, the 6.8's gonna fall transonic before 1,000 with the 120's. Yes, it still runs into the IPSC's I send it after. Just the same as shooting the 6.5 Grendel to 1200.

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Yeah I suppose if you're to dumb to find the trigger there probably isn't much difference between them.

labnoti said:

So there are bad reports on the Grendel in AR's?

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https://www.thehighroad.org/index.php?threads/ar15-in-6-5-grendel.817329/

mavracer said:

Yeah I suppose if you're to dumb to find the trigger there probably isn't much difference between them.

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I believe he is trying to tell you that real life experience owning and shooting both to 1000 trumps an app on your phone, and I think most reasonable people would agree.

someguy2800 said:

I believe he is trying to tell you that real life experience owning and shooting both to 1000 trumps an app on your phone, and I think most reasonable people would agree.

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It's called a Ad Hominem attack where the facts don't support your position.
Funny that about 75% of the guys I see shooting PRC (you know guys that it hits and misses at long range matter) use Streloc including myself. If you have some information on something that works better to predict external ballistics please share.
But Streloc seems to be working spot on for my 5.56, Valkyrie, 243, 6 Creed, 308 30/06 300 Win Mag for PRECISION at long range heck it even works great for 22lr out to 200-250.
Maybe Varmintterror's 6.8 is just magic.

BigBlue 94 said:

The one thing about grendel is it can support some pretty long VLD bullets that are available for the other 6.5mm rounds. However, you can't often fit these in a AR magazine.

I have zero experience with the 6.8

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I don't have any experience with the 6.8 either but I'm giving a serious look at the .22 Valkyrie which is a necked down 6.8.
kwg

The difference: some people think bullets fall out of the sky as soon as StrelokPro says they fall transonic...

Some bullets fair better passing through the transonic transition than others, nothing magic to it. Guys shoot 6.5 Creeds to a mile, 5.56’s to 1,000, even 6.8’s to 1,000.

Varminterror said:

The difference: some people think bullets fall out of the sky as soon as StrelokPro says they fall transonic...

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In the real world all bullets fall out of the sky it's that whole gravity thing slower they go the faster they fall except in Varmintterror's mom's basement wherewher 6.8 has a ACME super stabilizer.
I've seen guys shoot 6.5 Grendel at 1000 in person it does pretty good,it does get winded easy, I can't even find a video of a 6.8 at 1000 with a Google search.

I didn’t know the OP’s sole purpose for this new caliber was 1,000 yard shooting? Cause that’s what the last page has been about. Here I thought it was judging the whole merits of the two cartridges. But 1,000 yard shooting is all the rage these days.

It’s a foregone conclusion that the 6.5 Grendel will stay transonic longer than the 6.8, I don’t think anyone disputes that.

And I have little doubt that @Varminterror knows what he’s talking about, I’ve listened to his posts in the past and he’s a wealth of knowledge.

brutus51 said:

Couple of points I've come across. One report claims the 6.5 grendal has magazine problems in that the fat case tends to wobble around inside the magazine causing feed related problems. The other is the 6.8 being a longer cartridge is limited to 115gr. bullets.
I also read the LMT is making a 6.8 rifle with longer proprietory magazines to accommodate the longer bullets.
6.5 Creed bolt gun is sounding better all the time.

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The 6.5 Grendel has had reported struggles in the past with magazines due to its fat case and the followers of the magazines tend not to hit the neck right to support properly. I haven’t kept up with the current 6.5 Grendel magazine advancements but it's my impression this has been resolved with Grendel specific mags.

The 6.8 can load 120 SST without a problem at STANAG lengths. Any longer and there are a few magazines out there that do not have overlapping, spot welded seams (they are butt welded) which allows one to load longer in STANAG configuration.

The LWRC, Sulzer, and rumored New Frontier Armory, “Six8” lowers will provide a wider and slightly longer AR15 magwell which will allow the use of Magpul Six8 magazines, but more importantly will allow for longer loadings than STANAG length for .224 Valkyrie/6.5 Grendel/6.8 SPC II/etc. There is a company that hasn’t been released yet that is looking to make metal mags for those lowers for several of the different loadings, particularly the 6.5 Grendel and the 6.8 SPC II. This will help in multiple areas as it will provide greater latitude in follower design (6.5 Grendel needs this) and greater length which both can benefit from. With this extra length it only improves on the benefits of the 6.5/6.8. They are great cartridges for the AR15 already, but this will be a great advantage which I will most likely be purchasing a receiver set to transition my parts of my 6.8 SPC II over to. This would allow loading of 130-140gr class bullets.

This new receiver set is an advancement that all AR15 cartridges can take advantage of if they choose, but they are having to buy non-STANAG form magazines, but for someone entering one of these cartridges they wouldn’t have magazines for them yet anyways.

To the OP it sounds like for your needs your 6.5 Creedmoor will fit your needs. Either of the 6.5/6.8 would more than adequately take deer and they’ve both proven that over the last 10 years. And certainly the 6.5 Creedmoor will do that job better. But if you want the simplicity of the bolt action for your winter hunting then buy a bolt action.

brutus51 said:

Couple of points I've come across. One report claims the 6.5 grendal has magazine problems in that the fat case tends to wobble around inside the magazine causing feed related problems. The other is the 6.8 being a longer cartridge is limited to 115gr. bullets.

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I have no idea what this 6.5 Grendel 'wobble' in the magazine is.

Obviously, 6.8 is NOT limited to 115 gr. bullets as Hornady sells factory loaded 120s.

brutus51 said:

Couple of points I've come across. One report claims the 6.5 grendal has magazine problems in that the fat case tends to wobble around inside the magazine causing feed related problems. The other is the 6.8 being a longer cartridge is limited to 115gr. bullets.

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Neither of these are accurate - unless the user is running absolutely the wrong mags.

Can’t put Grendel’s (or SPC’s) into 5.56 mags, and can’t get 2.3” rounds into all magazines - but the commonly recommended mags for each respective cartridge run fine. Elanders and C products for Grendel, PRI, Barrett, and ASC mags for SPC. Happy rifle, happy life.

The newer generation ASC 15 round magazines can load out to 2.315 COAL. And there are several others that can load out to that length as well.

brutus51 said:

Once again you have to forgive my ignorance but I haven't a clue what a "STANAG " is.

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Sorry it just means it’s a standard mag for NATO countries that utilize it. Or in other words it’s a magazine that fits the standard mag well for the AR platform.

brutus51 said:

Once again you have to forgive my ignorance but I haven't a clue what a "STANAG " is.

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STANAG = Standardization Agreement. The NATO parties agreed to use common gear...

Double Naught Spy said:

Obviously, 6.8 is NOT limited to 115 gr. bullets as Hornady sells factory loaded 120s.

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The 6.8 is kinda stumpy though. If you have a constant 0.05" meplat the max tangent radius at standard COL/trim, is 5.6 cal... for the Grendel it's 10 cal, the .308 is 8.2 cal, and even the .223 is 6.9 cal.

Doesn't matter for its intended purpose but it's one reason it would be a joke as a "5.56 replacement", a role all those articles in the early 2000s told us it might fill. Yeah, right.