Maybe you can help me here. A weird thing happened today when I took my AR to the range to confirm the zero. I am using the same sight adjustments I use for my match ammo, (69gr SMK over 24.2rgs W748, vel approx. 2875fps.) for my deer slaying ammo, (64gr Winchester powerpoints over 25grs of W748) and found the point of impact had drastically changed. I ended up having to drop the rear sight 12 clicks (1/4 clicks, 3"@100yds) to get sighted in. I know different ammo will have different zeros but this seemed like a heck of a lot of difference to me. If I had any of my match stuff I could have checked if the original zero still was good but since I didn't, I couldn't.
Does this big of POI change sound right to you? If not do you have any ideas what it might be other than somehow I banged up my sights?
Thanks!