Why did, or will you choose the 6.8?

[phoenixtac]

I'm currently doing my D.D. on the 6.8 SPC Cartridge, do any of you have experience shooting, or testing the cartridge?
What would you consider it's maximum range, and how are the groups at that range?
Lastly...what length barrels did you shoot it with, and velocities recorded?
That about sum's it up, and thank you for the information in advance.

[Harv]

I can barely afford to shoot the amount of 5.56MM I like... for me switching to 6.8MM just ain't happening... would make it even more expensive.

Just my take

[TimP]

The main reason I decided to go with a 6.8 is because of its size, and even that is two fold.
1: Its bigger than a 223/556
2: It still fits in a 223 sized AR-15

The 6.8 is just a neat caliber. It gives me the same traj as a 77gr 223 and a 308 168gr SMK. So its range is just as good as a 38, to an extent.

So the 6.8 will have pretty much the same range as a 223, it will just hit harder. Though if you handload a SMK fairly hot, I think you might get a better traj than a 223.

My gun was built by Grant.
16.1 Noveske brl
Troy 12.0
With Rem OTM ammo I am getting right at 1.25MOA @ 100 yards with it. Handloads will get better than that. The recoil is subjective. My gun has a vortex fh, but I am going to swap it out for a MSTN brake. The recoil isnt bad, not much more than the 223, I just want to stop the muzzle rise.

http://coloradomultigun.com/misc/sgn_68spc.pdf

that link will tell you pretty much everything you want to know.

[phoenixtac]

Thanks for the info so far, I will read the link when I get more time.

[Stephen_H]

More retained energy downrange in the same sized weapon as 5.56mm. It's that simple. I give up three rounds in the mag and a negligable increase in recoil. At the rate 5.56mm ammo is increasing in price, it's not that much more expensive to shoot 6.8mm SPC (apples to apples; you're not going to find surplus 6.8mm).

Stephen

[Sean King]

A better BC (than 5.56) out of a short bbl. That's my reason (10.3" bbl).

Sean

[VA_Dinger]

With ammo prices going through the roof I don't see myself leaving 5.56mm any time soon.

If anything my next move will be to .308.

[Submariner]

I'm seriously thinking of getting OUT of 7.62mm because it is a service round and 6.8 SPC might fall through the cracks on the next bout of gun-grabbing (if ammo taxation is part of it; Moynihan once proposed taxing .45 ACP, 9mm, 5.56mm, 7.62mmX39, and 7.62mmX51.) The price differential between good 5.56mm (Black Hills) and 6.8 SPC is narrowing. The 6.8 SPC requires less powder per round than 7.62mm and bullets are SMK's are about 75% of 7.62mm varieties when reloading costs are considered. Plus, M1A's (my 7.62mm of choice) have a whole different manual of arms.

Knowing what I know today (what has been posted above), if I were just starting out, I would probably go with 6.8 SPC and a dedicated .22LR upper for practice.

[RyanS]

I'm seriously thinking of getting OUT of 7.62mm because it is a service round and 6.8 SPC might fall through the cracks on the next bout of gun-grabbing (if ammo taxation is part of it; Moynihan once proposed taxing .45 ACP, 9mm, 5.56mm, 7.62mmX39, and 7.62mmX51.) The price differential between good 5.56mm (Black Hills) and 6.8 SPC is narrowing. The 6.8 SPC requires less powder per round than 7.62mm and bullets are SMK's are about 75% of 7.62mm varieties when reloading costs are considered. Plus, M1A's (my 7.62mm of choice) have a whole different manual of arms.

Knowing what I know today (what has been posted above), if I were just starting out, I would probably go with 6.8 SPC and a dedicated .22LR upper for practice.

Very thought provoking. The one thing that's kept me away from the 6.8 is the cost, however, in light of the narrowing of the gap and the fact that the "antis" will not be so generous the next go around (read more thorough), the build I've been planning may just take a new direction. Don't think I'll give up on the 5.56 though.

[QuietShootr]

Two words:

Bolt breakage.


Anyone got data on the parts failure of 6.8s run hard?