My thoughts as well..I’m a big 6.5 Grendel guy myself..I ran one for a little while but then replaced it with the 6.5 Grendel. Easy to build, easy to get ammo or load for, and better bullet selection than the 6.8 SPC.
For what it's worth, the 6.8 SPC is a great hunting round for medium to light game inside a few hundred yards.
I realize you’re probably talking about longer barreled rifles, but better be careful making that sort of recommendation without clarification. Newbies are going to think they can take their 5.56 AR pistols out and kill deer (or larger animals) at 600 yards without repercussions. Shooting steal at 500 yards with my 10.5” SBR 5.56 speaks volumes about the energy or lack there of. By comparison, the 6.8 is easily the better option, short barreled or not.In a small frame AR I would never consider using anything except a .204 for varmints or .223 or 5.56 for larger game. Both simply work, are cheap to shoot, accurate and work well to on game to 600 meters with uniform excellence. Both utilize standard BCG's and mags. No need for anything else.
Damn that’s smoking fastMy go to load is the 120sst in a 20" ARP barrel with AR-COMP at 2730fps that flat out kills hogs but has a bit of fragmentation given the bullet design for whitetail use so I usually use the 85 grain TSX for that which can be fairly easily pushed to 3000 fps with Rl-7 with good accuracy.
Damn that’s smoking fast
I had a handguard like that, wrapped it in paracord and that made it much better in the cold. Also helped with the annoying ring when I bumped it against something hard.I’ve taken deer out to a little over 200 yards with 85gr Nosler E-Tips and the performance was great for my 16” Wilson Combat barrel. If I was to do this over I’d build a 20” and max out on velocity and hunt from my blind. I don’t carry my 16” in the woods , only from my blind because the aluminum FF tube is cold during rifle season and hard on the hands.