The old question 6.8 vs 6.5 for the TBH Brain Trust

[Colton]

16" is perfectly fine, if you decide to SBR the 6.8 does well even out of a 12.5" barrel

The 6.8 def shoots flatter than the 300 blk but if you're wanting 4-500 yards you might look at the Grendel

[Outbreaker]

Grendel and SPC are neck and neck to about 150. Past 150 the Grendel starts to overtake the SPC and accelerates the differences the longer the distance.

I like the 120 gr NBT for hunting. I had a tack driving load for the TTSX but the velocity was not there for consistent expansion.

[APYnckel]

Sorry I was wanting to compare the 6.5 Grendal to the 6.8, the AR15 platform.

As mentioned ammo seems to be more available for the 6.8 & I don't reload (yet).

Is a 16" barrel good for the 6.8 or does it need to be longer?

I talked to the guy at ARF.com at Canton Saturday and they don't offer a 6.8 barrel there. He said that the 300 BLK would serve the same purpose and then he would graduate to the 6.5 G. I have a 300 but haven't shot it out to the 400 yds he said it would be capable of shooting. I've always understood that the 300 was a 200 to 250 yd gun and that would be max for it. This is confusing to me!

The reason for the original question is 'd like to reach out to 4 to 500 (that's all I think I can shoot) as economical as possible.

If you're looking for a solid barrel for 6.8 SPC, look at white oak armament...

https://www.whiteoakarmament.com/shop/barrels/6-8-spcii-barrel.html

300BLK is for all intents a purposes a sub 200yrd gun. It just doesn't have the velocity to really reach out there.

Then I would say that 6.8SPC would get you out to 400, and anything beyond, look into 6.5 Grendel.

[geezer56]

I have both in AR's. Flip a coin. Not enough difference to worry about, up to 300 yds. Past 300, I personally run out of eyes. In a bolt gun, Creedmoor all the way. Beats either the Grendel or SPC any way you can measure it.

[Outbreaker]

I have both in AR's. Flip a coin. Not enough difference to worry about, up to 300 yds. Past 300, I personally run out of eyes. In a bolt gun, Creedmoor all the way. Beats either the Grendel or SPC any way you can measure it.

True, and in a bolt gun my .300 RUM smokes the creedmoor.

[Roosterpt1]

6.5 without any hesitation. It will out penetrate, out perform ballisticly and more inherently accurate.