Re: which acog/scope?
I also have a TA31 for my 6.8, horseshoe/red dot and really like it. I'm going to put a TA11H 308 on a new 338 fed AR-10 and will be horseshoe. I killed a few caribou last fall with that acog and within 250 yards pretty right on. I did kill one at 550 yards with same acog, but at that distance, the horseshoe was like over bou's antlers. At 100 yards, the red dot is like 8 inches. Those acogs are about the quickest shooting scopes I have ever used. It's pull up bang in one motion, not pull up, cross hairs on target, then bang.