Thanks Neil that makes sense as 15yds is my short zero, I did shoot it on the plinking range, only a couple of shots, as they were off POA I assumed it was the wind. Lookingback they're really wasn't much wind on the plink at that time. I think it's a confidence thing, I hate aiming over or under and even more so with windage.
All the chaps on here have been really helpful though, so hopefully I will get there at some point.
Thanks again Neil,