How are you shooting? I don't mean to sound insulting, but are you sure that the problem is not YOU?So not happy meter is still pegged...
Are you using that bipod? Use a sandbag. What are you using for a rear rest?
Are you really just shooting 2- or 3-round groups? Shoot 5-round groups, and shoot several of them.
Especially starting with a cold barrel, 3-round groups are insignificant.
Your groups tightened up quite a bit going from iron sights to the EoTech... how good is your eyesight?
And how big are those targets?
If those are .30 or 1/2" holes you're making, then it looks like you're shooting 2-3" groups at 75yds. What are you expecting?
The rifle should shoot better than 5moa, but 2-3moa is no reason to be unhappy. From what I've seen, it's the rare match rifle with handloads that can consistently shoot 1moa.