I also brought along the AR pictured in my previous post, to confirm zero on the ACOG. It performed well, shooting roughly 1.5 MOA at 100 yds with 75 grain OTM from Stand1armory.com: http://www.stand1armory.com/store/p49/. ... MATCH.html.
The ammo I used for the SCAR is remanufactured 168 grain HPBT Match from Freedom Munitions: http://www.freedommunitions.com/category-s/2046.htm. For inexpensive remanufactured ammo ($170 for 240 rounds), it performs very consistently. I am impressed with it and will be buying more. I went to Bass Pro only because when I got to Elm Fork, I learned that they are no longer open on Tuesdays. Anyway, the guy at the gun counter was very pushy about letting him boresight the scope, even though it wasn't necessary, and so I let him. He set the gun in his mount, looked through the scope without getting up on it (naturally not having the sight picture properly centered), and he dialed in nearly full left windage and left it there! When I commented, he said, "that's how far out it was". This, on a precision tactical scope. Now, I have shot this very same scope at 500 yards, zeroed for 300 yards, and I know it is better than that. Ridiculous! Fortunately, the scope performed flawlessly and came back into spec quickly despite the Bass Pro guy's monkeyshines.
Accuracy:
How did the the SCAR perform, you ask? Superbly. I only fired the one box of ammo, in groups of 5 rounds each. You can see the progression from the target picture below. I fired the first group of five at 25 yards. The rounds hit right at left edge of the target. They were tight together, but way off. I dialed in 7 mils right and moved the target out to 50 yards. The 2nd set of 5 rounds landed in a tight .5" group. Then I moved the target out to 100 yards. I knew the rounds would hit higher, but as you can see from the picture they landed just below the top edge of the paper, horizontally strung out. The light inside the rifle tube was dim and the 100 yard distance, and I couldn't really see where they were hitting; so I brought the target back in to 50 yards where the lighting was better, saw the group placement, dialed in 2.5 negative mils of elevation, and moved the target back out to the 100 yard line. The next 5 round group landed right on top of the 2nd group (closeup below in 2nd picture), expanding it to .75".

THIS, ladies and gentlemen is 10 rounds into a .75" hole, out of a battle rifle, no less. Honestly, it is hard to beat that with my Remington 700 without handloads.

The SCAR 17S is extremely accurate for a semiauto battle rifle. Recoil, while present, is considerably less than any other .308 I've ever shot.
Negatives:
- Let's talk noise. The SCAR 17S is LOUD!!!. It is louder than my 16" barreled .308 Gunsite Scout. The SCAR's muzzle device is very effective at reducing recoil, but it also would make life pretty hard for the people in the lanes on either side of you. The muzzle blast is significant. I'm OK with that because I'm going to put a suppressor on it, but unless you're willing to invest in obtaining a suppressor, stick to outdoor ranges.......and shoot alone.
- Trigger. I can live with it if I have to, but I don't have to. The OEM trigger is fairly crisp, but the trigger breaks at 8 lbs, which is too heavy, even for a combat weapon in my opinion. The .30 caliber suppressor was on my shopping list before I acquired this rifle, but a replacement trigger is my first planned upgrade specifically for this rifle.
Conclusion:
I love this rifle. Love it love it love it. I love its light but loud little butt.