well, I started out with my Aimpoint CompC-2X on top and 100 rounds of Portuguese surplus to sight in with. It was Very easy to sight that red dot in and it makes for some really wicked snap shooting, I kept thinking..."Damn, what if I was hunting bad guys with this?"
Needless to say, I went through that first hundred very quickly. Next, I had an ammocan of mixed headstamp .308(Dented Brass ammo from Southern Ammo I believe). I went through about 300 rounds of that with relativly few problems. The only problem I had was from the rifle getting really dirty. I also think I like shooting using the iron sights better for some odd reason.
That's OK because the A.R.M.S #22M68 Throw Lever Ring just came in, so I can switch the Aimpoint out in a snap.
So far, I am absolutely thrilled with my purchase! I need more mags and ammo though(don't we all?)