Let's see.. 6.8 SPC vs 6.5 Grandel vs .300 BLK

2bad4u2 said:
I don't have any information on 6.5 Grendel or 6.8 SPC but here's some ballistic data comparissons between .300 Blackout and 5.56m (M193) ammunition. I don't see where anyone is thrying to make the cartridge more than what it is.

Here's something for you and VanIsler to consider...

300-BLK_barrel_length_comparrison.jpg
Click to expand...

If your only concern is short range performance it could be used out of longer barrels. It does retain more energy than the faster, lighter 5.56 bullets which is potentially an advantage.

I have seen people pitch the round as a superior general purpose round to 5.56, though...that's making more out of it than it is. It's a short range round and that is all IMO. Trajectories are catapultesque at any significant distance.
 
VanIsler said:
Anyone shooting 6.5 Grendel?
Click to expand...

I have built Grendel on AA barrel , Saber Defense ( before they closed ) and Satern . The Saber barrel was nice ( came with a Gill brake ) and a mid length gas system. The Satern is a rifle length system

The best Grendel is the Satern barrel. This is a single point cut rifle barrel .

Please note that Satern changed chamber to the 264LBC prior to SAAMI accepting the 6.5 Grendel.

When doing these builds, Bill Alexander was very helpfull and a wealth of knowledge ( not just Grendel stuff....guns in general ) . He sold me on ponying up the $$ for a Satern barrel and I have not been disappointed

You need to be carefull because many "Grendels" not true Grendels. Best example was Competion Shooting Systems 6.5 which use a 7.62X39 bolt

It is a common mistake to assume that the 6.5 Grendel uses a 7.62X39 bolt. It uses a bolt with .011 more headspace. A grendel bolt in a 7.62X39 will close ( didn't try to pull the trigger ! ). A 7.62X39 bolt in a Grendel won't even come close to camming over

According to AA, the 6.5 Grendel bolt is built with better steel which helps preven the bolt breakage that plagues 7.62X39 bolts . When AA licenced a barrel, it ALWAYS came with one of his bolts

If you decide to go the CSS or LBC route, you should source out a LMT 7.62X39 bolt. They are far superior to a off the shelf 7.62X39 bolt. They have them in stock...its just noted listed so you need to ask them for it. According to LMT , they were made for a project that never got off the ground

My plinker loads are made with 7.62X39 brass . My serious loads are loaded with Lapua brass

This build was attempt at a clone of MK12Mod1 ( except for caliber obviously ) , to be partner of my MK12Mod0 . OPS Inc wouldn't make a true Mk12 brake and collar for me, but did make a Ops Inc brake in the goofy thread of the Satern Barrel. They turned it around in less than a week !

Upper is a Larue M4 with a KAC FF rifle length. Lower is a Spikes with Geissle Hi Speed . Irons were not on rifle when pic was taken

MK12Mod1-10.jpg
 
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#74, of "Special Weapons" Had a article comparing the 6.5 Grendel vs 6.8 SPC.

From reading the article, and my experience of the 6.5 swede cartridge, I would personally choose the 6.5. Superior to the 5.56 in cqb, superior to the spc at range. If you are looking for just a cqb round, a 7.62x39 hunting round would due. I feel, the best balanced is the 6.5.
 
JTF# said:
i built a 6.8 last year and i will never go back to 5.56. its a shame no militarys have money anymore because they should be changeing over to the 6.8 no contest. 6.8 is easy avalibale my local store stocks it.

the 6.8 is a military cartridge. better stopping power and accurasy and range then the 5.56.

the 6.5 would be my next choice. its more of a long range target shooting cartridge or light game.

the .300 i think is clumsey and is more for slienced guns and close range power.

i have an artical in a magazine about all the new cals for the AR15. if you want it i can send it to you. it says accroding to them .30 remington AR is the best cal in the AR. but so far i think the remington R-15 is the only gun useing it. if you make a custom barrel thats is the cal to go with tho.

if you want the mag let me know. i can dig it out.
Click to expand...

Service loads in 6.8SPC have a noticable increase in drop and drift at 500m compared to SS109. Like lots.
Match loads are more of the same.
 
TRG-42 said:
I have built Grendel on AA barrel , Saber Defense ( before they closed ) and Satern . The Saber barrel was nice ( came with a Gill brake ) and a mid length gas system. The Satern is a rifle length system

The best Grendel is the Satern barrel. This is a single point cut rifle barrel .

Please note that Satern changed chamber to the 264LBC prior to SAAMI accepting the 6.5 Grendel.

When doing these builds, Bill Alexander was very helpfull and a wealth of knowledge ( not just Grendel stuff....guns in general ) . He sold me on ponying up the $$ for a Satern barrel and I have not been disappointed

You need to be carefull because many "Grendels" not true Grendels. Best example was Competion Shooting Systems 6.5 or 264LBC which use a 7.62X39 bolt

It is a common mistake to assume that the 6.5 Grendel uses a 7.62X39 bolt. It uses a bolt with .011 more headspace. A grendel bolt in a 7.62X39 will close ( didn't try to pull the trigger ! ). A 7.62X39 bolt in a Grendel won't even come close to camming over

According to AA, the 6.5 Grendel bolt is built with better steel which helps preven the bolt breakage that plagues 7.62X39 bolts . When AA licenced a barrel, it ALWAYS came with one of his bolts

If you decide to go the CSS or LBC route, you should source out a LMT 7.62X39 bolt. They are far superior to a off the shelf 7.62X39 bolt. They have them in stock...its just noted listed so you need to ask them for it. According to LMT , they were made for a project that never got off the ground

My plinker loads are made with 7.62X39 brass . My serious loads are loaded with Lapua brass

This build was attempt at a clone of MK12Mod1 ( except for caliber obviously ) , to be partner of my MK12Mod0 . OPS Inc wouldn't make a true Mk12 brake and collar for me, but did make a Ops Inc brake in the goofy thread of the Satern Barrel. They turned it around in less than a week !

Upper is a Larue M4 with a KAC FF rifle length. Lower is a Spikes with Geissle Hi Speed . Irons were not on rifle when pic was taken

MK12Mod1-10.jpg
Click to expand...

Beautiful rifle.
 
If I was wealthy enough (Ha!) I'd have one of each (6.8 SPC, 6.5 Grendel, .300 BLK). Who wouldn't want to have that luxury? It'd be a lot of fun IMHO. I'd probably have one dedicated lower with a 2-stage match trigger and a Magpul PRS coupled with multiple upper receiver assemblies.
 
I have not read the thread, and aren't into it right now, but if the OP is still in it, does he know that he can edit the title of the thread so it doesn't make me laugh every time I come to the Black Rifle area......ha

I know I'm not the first one to point it out
 
JTF# said:
my guess is you have never shot a 6.8mm
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I predominantly shoot 5.56, 6 PPC, 6XC, .308 & 30-06. They all 'suffer' in differing variety from wind drift - as does all ordinance.
Are you saying 6.8mm is a magical round that when fired, has no drift?
 
The 6.5 mm cartridges (Grendel, Creedmor etc.) have excellent ballistics. I wonder if any one is going to try to neck up a 223 case to a 6.5 mm bullet.
 
FTW Syntax said:
The 6.5 mm cartridges (Grendel, Creedmor etc.) have excellent ballistics. I wonder if any one is going to try to neck up a 223 case to a 6.5 mm bullet.
Click to expand...

Yeah its been done called a 6.5TCU made famous/popular in T/C Contender handguns/carbines.

I had one in a 10" barreled Contender handgun over 25 years ago.
 
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