In my opinion its the best caliber for hunting in the AR15 platform. I am not just saying that because I use one, I am saying that because I have used it extensively over the last 4 years and have always been very impressed it! On multiple occasions I have dropped multiple mid size hogs with a single shot. The buck in my signature picture was dropped with a 6.8 as well. It was about a 100 yard shot severely quartering away so I had to aim very far back to angle it into the vitals. Buck went less than 20 yards before crashing and he was a very large bodied buck.
I could have built any caliber I wanted but after months of reading the 6.8 made the most sense for hunting purposes.
I have several and really enjoy shooting them and they will be more effective and a better hunting round than the 556. One of mine has an AR15 Performance barrel on it and it will shoot .75 all day with factory Hornady 120 gr SST. I have taken it out to 600 yards on several occasions.
My next build will likely be a 14.5 sbr with another AR15 Performance barrel.
Originally Posted By: syncerus
I prefer to think of myself as a control enthusiast.
I'm a HUGE 270 fan. But I can't get on board for the 6.8 yet, when it comes to AR's. Comparing the 6.8 to the 300 blk out, the blk out is just so much more versatile. Yes, the 6.8 has more power than a 300 blk out, but not by much. In a 16 barrel, a 115 Berger runs 2300+ fps. A 6.8 pushes the same weight bullet only 100 fps faster (maybe 150) in the same 16" barrel. The 30 cal bullet choices and variety are about 10X that of the 6.8. In the AR platform, the conversion for 300 blk out uses all existing components as 223, like bolt carrier, mags, etc. It's just hard for me to sway from the 300 blk out.
I have one. I built mine for pig hunting at night. Its extremely accurate, the one i have anyway. I have only killed one pig with it thus far. Here's a video if you want to check it out. Also I know TexasLawman uses a 6.8 and has quite a few kills with it. I think his youtube page is Lonestar boars. His success alone should at least intrigue you dig more.
There is also a lot of info on 68forums. I was on the fence with the 300 blackout and the 6.8. I can get 6.8 ammo in a lot places and the 300 blackout seems to be showing up better than in the past. I don't reload so I wanted to make sure I can quality ammo readily accessible. I am sure I will end up with a 300 blackout at some point but at the moment I couldn't be happier.
And yes you have to have a separate components as mentioned above. Mine is a complete upper so all I have to do is pull 2 pins and swap between my 556 and 6.8. If I had a 300 blackout I would do the same. So for me, those added components shouldn't be a sway vote. If your getting rid of your 556/223 barrel using all the same parts and converting to a 300, then I can see that coming into play.
As stated above it is a great round and in my opinion the best deer and hog hunting round in the AR platform. It has numerous hunting bullets to choose from and they have become readily available in stores. it outperforms the 300BO at any distance.
_________________________ firstname.lastname@example.org 214-945-5520 The 6.8 is the #1 choice for hunting deer and hogs in an AR15