Wouldn't zero - Trijicon ACOG 4x32 Scope w/TA51 Mount

Let's start saying this is the best do all combat optic on the planet. However it's my luck to receive a product that was opened once before. There is a package with a cover inside called a scope coat it was in fact opened. anyhow the acog looked, felt and mounted perfect then I hit the range. I've seen reviews saying it takes a click here and there to zero. So I started at a 100 yds and nothing on paper so then 50 nothing so 25 and aiming top right got me bottom left. After 50 rounds and some clicking it wasent moving across the paper. Now iam sure trijicon would of resolved the issue but I waited a long time to spend $1307. And my guts turned so I returned it for the burris mtac(408) also from opticsplanet. Mind you this is not the first trijicon product I've seen have issues out of the box. If you got the money take the leap just make sure where ever you but it from has a good return policy.