I hit the range yesterday, determined to get my AR10 with TA11C sighted in with my new go-to ammo, the 155 grain TAP. I'm using a 50 yard center of donut zero, which actually matches the BDC trajectory as well as anything else with this load. Firing from sandbags off of a bench and after adjustments, I got about a 2 inch group, roughly surrounding the center.
How well should I be able to shoot with the donut at 50 yards? I shoot just as well with my unmagnified EOTech, so it seems I should be doing better with the ACOG. What types of groups do you guys like to get for sight-in?
Before, I had just been using Aussie surplus, so I could shoot a lot of rounds and slowly get closer and closer to POA=POI, over a lot of sessions, but at $1 per shot with difficult availability, I don't really want to expend any more ammo than necessary with the TAP.